Octane Booster - BMW Luxury Touring Community
 
LinkBack Thread Tools Display Modes
post #1 of 23 Old Sep 8th, 2013, 6:20 pm Thread Starter
Senior Member
 
timgray's Avatar
 
Join Date: Jun 2013
Location: Muskegon, MI, USA
Posts: 377
Octane Booster

When riding more rural places I am finding that a lot of stations do not have premium, and if they do, I highly doubt the age of the fuel in the tank is fresh enough that it is still anywhere near 91 octane.

Does anyone know if "octane booster" that you can buy at auto parts stores would work in the instance when you are in the middle of nowhere out of fuel and you have to use questionable gas?

Currently riding a 2003 K1200LTC
timgray is offline  
Sponsored Links
Advertisement
 
post #2 of 23 Old Sep 9th, 2013, 7:01 am
Senior Member
 
TeddyTelco's Avatar
 
Join Date: Jan 2013
Location: Boston, Ma, USA
Posts: 308
Re: Octane Booster

My previous owner never used premium. I don't think it's called for. I use it if available if not I use the highest grade. In Mass we have 93 when I ride up north they mostly have 91.I don't think I would bother with booster....

2009 BMW K1200LT "Shelly"
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2002 Honda VT1100 Sabre Sold
1979 Harley Davidson FXEF 1340 Sold
1975 Norton 850 Commando Sold
TeddyTelco is offline  
post #3 of 23 Old Sep 9th, 2013, 10:16 am
Senior Member
 
Join Date: Aug 2010
Location: Kansas City, KS, USA
Posts: 217
Re: Octane Booster

I doubt the "freshness" of fuel has much to do with the octane rating. In an emergency, one could add no more than 10% Toluene or Xylene to raise the octane number from 89 to 91. These chemicals are used as paint thiners and available from hardware stores, but are hazardous and carcinogenic. Then again, if one were forced to run one tank of regular fuel, by keeping the engine lightly stressed i.e. no wide open throttle, the risk of detonation is greatly reduced. This is probably the safer option. For long term use follow the recommendation to use premium.

If you doubt the necessity for premium fuel, have a look at the picture included with post #36 in this thread:

http://www.bmwlt.com/forums/showthread.php?t=72350

André Strydom
BMW MOA #140995

"And there is salvation in no one else, for there is no other name under heaven that has been given among men by which we must be saved."
Acts 4:12
andres is offline  
 
post #4 of 23 Old Sep 9th, 2013, 12:32 pm
Lifetime Supporter
 
Voyager's Avatar
 
Join Date: Jun 2007
Location: Lawrenceville, PA, USA
Posts: 7,146
Re: Octane Booster

Quote:
Originally Posted by andres
I doubt the "freshness" of fuel has much to do with the octane rating. In an emergency, one could add no more than 10% Toluene or Xylene to raise the octane number from 89 to 91. These chemicals are used as paint thiners and available from hardware stores, but are hazardous and carcinogenic. Then again, if one were forced to run one tank of regular fuel, by keeping the engine lightly stressed i.e. no wide open throttle, the risk of detonation is greatly reduced. This is probably the safer option. For long term use follow the recommendation to use premium.

If you doubt the necessity for premium fuel, have a look at the picture included with post #36 in this thread:

http://www.bmwlt.com/forums/showthread.php?t=72350
You seem very confident in knowing why that piston failed. The owner said he ran 89. I will have to check my manual, but my recollection is the 89 meets the requirements set by BMW.

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Voyager is offline  
post #5 of 23 Old Sep 9th, 2013, 1:17 pm
Wrencher Extraordinaire
 
jzeiler's Avatar
 
Join Date: May 2004
Location: Hazel Green, AL, USA
Posts: 13,266
Re: Octane Booster

From the 99-2004 service manual. I realize this is just the RON method but it generally equates to 91 Octane RON+RM. The 05 and up has a higher compression. Choose your fuel wisely.

Pics here are from a 100,000 miles 2002 with both the brown wire and air box mods.
Attached Thumbnails
Click image for larger version

Name:	Octane.JPG
Views:	368
Size:	42.9 KB
ID:	40778   Click image for larger version

Name:	piston.JPG
Views:	1294
Size:	267.0 KB
ID:	40786   Click image for larger version

Name:	cylinders.JPG
Views:	692
Size:	275.6 KB
ID:	40794  

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jzeiler is offline  
post #6 of 23 Old Sep 9th, 2013, 3:48 pm
Member
 
Join Date: Apr 2007
Location: Kearney, NE, USA
Posts: 41
Re: Octane Booster

FYI the attached link really does a good job of explaining detonation and preignition. At least in my case I certainly understand more of how it occurs. Lot of variables in play cause those pistons to fail.

http://www.contactmagazine.com/Issue...ineBasics.html
High_Plains_Drifter is offline  
post #7 of 23 Old Sep 9th, 2013, 10:08 pm
Lifetime Supporter
 
Voyager's Avatar
 
Join Date: Jun 2007
Location: Lawrenceville, PA, USA
Posts: 7,146
Re: Octane Booster

Quote:
Originally Posted by jzeiler
From the 99-2004 service manual. I realize this is just the RON method but it generally equates to 91 Octane RON+RM. The 05 and up has a higher compression. Choose your fuel wisely.

Pics here are from a 100,000 miles 2002 with both the brown wire and air box mods.
This is a picture of the gas door sticker on my 2007 LT. It says that 89 AKI is fine (AKI = (R+M)/2). Just sayin...

Not sure why the image is rotated 90, but you can still read it if you lay down!
Attached Thumbnails
Click image for larger version

Name:	photo.JPG
Views:	670
Size:	1.26 MB
ID:	40818  

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Voyager is offline  
post #8 of 23 Old Sep 9th, 2013, 11:14 pm
Wrencher Extraordinaire
 
jzeiler's Avatar
 
Join Date: May 2004
Location: Hazel Green, AL, USA
Posts: 13,266
Re: Octane Booster

Quote:
Originally Posted by Voyager
This is a picture of the gas door sticker on my 2007 LT. It says that 89 AKI is fine (AKI = (R+M)/2). Just sayin...

Not sure why the image is rotated 90, but you can still read it if you lay down!
OK here is from the 2008 Riders manual. Go figure.

I have always run premium and always will.
Attached Thumbnails
Click image for larger version

Name:	Fuel.JPG
Views:	584
Size:	75.4 KB
ID:	40826  

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
jzeiler is offline  
post #9 of 23 Old Sep 10th, 2013, 6:01 am
Senior Member
 
GaryEm's Avatar
 
Join Date: Aug 2012
Location: Hudsonville, Mi., USA
Posts: 844
Re: Octane Booster

I always use Premium and go to extreme and every third ;fourth tank full put seafoam in it.
GaryEm is offline  
post #10 of 23 Old Sep 10th, 2013, 7:04 am
cwo
Senior Member
 
cwo's Avatar
 
Join Date: Nov 2009
Location: Baldwin City, KS, USA
Posts: 374
Re: Octane Booster

So back to the original question, will octane booster bring regular gas up to a safe level for the LT? If so what brands/type would be recommended .

Thanks, Chris Ogle

Life is ephemeral. Don't waste it lookin up big words.
cwo is offline  
post #11 of 23 Old Sep 10th, 2013, 7:12 am
Lifetime Supporter
 
Voyager's Avatar
 
Join Date: Jun 2007
Location: Lawrenceville, PA, USA
Posts: 7,146
Re: Octane Booster

Quote:
Originally Posted by cwo
So back to the original question, will octane booster bring regular gas up to a safe level for the LT? If so what brands/type would be recommended .

Thanks, Chris Ogle
A reputable product should work in a pinch when the appropriate fuel isn't available.

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Voyager is offline  
post #12 of 23 Old Sep 10th, 2013, 8:26 am
Senior Member
 
copperstatetour's Avatar
 
Join Date: Oct 2011
Location: Avondale, AZ, USA
Posts: 794
Re: Octane Booster

Quote:
Originally Posted by cwo
So back to the original question, will octane booster bring regular gas up to a safe level for the LT? If so what brands/type would be recommended .

Thanks, Chris Ogle
My .02 says the stuff on the shelf at Auto Zone is snake oil, I have no scientific reasoning except that the making of automotive fuel is a process that requires complex and sophisticated equipment and it seems a bit counter-intuitive to me that you can just buy 'octane' off the shelf. When I have read the labels completely (all the fine print on the back) there is usually some kind of statement to the effect of "achieves the results of higher octane fuel". Similes do not instill me with a great deal of confidence, but I am a skeptic.

If I were caught with no premium fuel available I think I would put in enough regular to get me to the next station and hope they have premium and so on, and just drive easy in between. Of course the way I ride I could probably get away with using regular all the time. As for high octane, the highest I ever see around these parts is 91, and it's ethanol to boot!

So here's a toast to the good ole' days when if you wanted higher octane you just slopped a little more lead in the mix.

-Steve

2000 BMW K1200LT
2000 BMW R1200C
copperstatetour is offline  
post #13 of 23 Old Sep 12th, 2013, 4:11 pm
Senior Member
 
lkchris's Avatar
 
Join Date: Feb 2012
Location: Albuquerque, NM, USA
Posts: 1,012
Re: Octane Booster

Ethanol is an octane enhancer.

Kent Christensen
Albuquerque
'12 R1200RT, '02 R1100S, '84 R80G/S
lkchris is offline  
post #14 of 23 Old Sep 12th, 2013, 7:31 pm
Senior Member
 
rowie's Avatar
 
Join Date: Sep 2009
Location: An hour southwest of Boston, MA, USA
Posts: 476
Re: Octane Booster

Quote:
Originally Posted by lkchris
Ethanol is an octane enhancer.
Kent is correct. Aside from the government mandates, that's what fuel companies are increasingly using it for (sadly).

BMWMOA member

Current rides:
2005 Dark Graphite Metallic BMW K1200LT
2002 Pearl Orange Honda VTX1800 Retro

Prior rides:
Suzuki GS425E (Australia)
Suzuki T250R (Australia)
rowie is offline  
post #15 of 23 Old Sep 12th, 2013, 10:44 pm
Senior Member
 
Join Date: May 2013
Location: Leduc , Alberta , Canada
Posts: 296
Re: Octane Booster

I'm with Gary and the Seafoam works well and keeps all internals clean. But could one answer this for me. I was under the impression that the only difference with premium was more antiknock additive and no ethanol but the actual combustion power off the fuel was the same. I have used both with no problem but maybe that's the Seafoam working.

My fuel lid states Super Blended fuel 95ROZ / 85MOZ but maybe that's the Canadian stats. We don't have the canister on our bikes so maybe the emissions are different in the USA ? So fuel is different.

BMWMOA
Never ride faster than your Guardian Angel can fly
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2007 K1200LT Storm Grey metallic
Uni Go Trailer

Last edited by Chayside; Sep 12th, 2013 at 10:51 pm.
Chayside is offline  
post #16 of 23 Old Sep 12th, 2013, 11:06 pm
Senior Member
 
Join Date: May 2013
Location: Leduc , Alberta , Canada
Posts: 296
Re: Octane Booster

From Wiki


Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating. In broad terms, fuels with a higher octane rating are used in high-compression engines that generally have higher performance. In contrast, fuels with lower octane numbers (but higher cetane numbers) are ideal for diesel engines. Use of gasoline with lower octane numbers may lead to the problem of engine knocking.[1]
Contents [hide]
1 Principles
2 Measurement methods
2.1 Research Octane Number (RON)
2.2 Motor Octane Number (MON)
2.3 Anti-Knock Index (AKI)
2.4 Difference between RON and AKI
2.5 Observed Road Octane Number (RdON)
2.6 Aviation gasoline octane ratings
3 Examples
4 Effects
5 Regional variations
6 See also
7 References
8 Further reading
9 External links
Principles[edit source | editbeta]

Octanes are a family of hydrocarbon that are typical components of gasoline. They are colourless liquids that boil around 125 °C (260 °F). One member of the octane family, isooctane, is used as a reference standard to benchmark the tendency of gasoline/petrol or LPG fuels to resist self-igniting. In a normal spark-ignition engine, the air-fuel mixture is heated due to being compressed and is then triggered to burn (relatively) slowly by the spark plug and ignition system. If it is heated and/or compressed too much, then it will explode when triggered (detonate), or even self-ignite before the ignition system sparks. This causes much higher pressures than engine components are designed for and can cause a "knocking" or "pinging" sound if light, or major engine damage if severe. This can break connecting rods, melt pistons, blow head gaskets, damage rod bearings, as well as damage other components. The octane rating is a measure of how resistant a fuel is to spontaneously or explosively ignite under such conditions. The higher the number, the more resistant the fuel is. Engines that have aggressive designs (high compression pistons, high intake density and/or temperature) or unusual operating conditions (low-speed, air-cooled engines such as small aircraft) require higher octane fuels.


Isooctane (upper) has an octane rating of 100 whereas n-heptane has an octane rating of 0.
The most typically used engine management systems found in automobiles today have a knock sensor that monitors if knock is being produced by the fuel being used. In modern computer controlled engines, the ignition timing will be automatically altered by the engine management system to reduce the knock (detonation) to an acceptable level.
The octane rating of gasoline is measured in a test engine and is defined by comparison with the mixture of 2,2,4-trimethylpentane (iso-octane) and heptane that would have the same anti-knocking capacity as the fuel under test: the percentage, by volume, of 2,2,4-trimethylpentane in that mixture is the octane number of the fuel. For example, petrol with the same knocking characteristics as a mixture of 90% iso-octane and 10% heptane would have an octane rating of 90.[2] A rating of 90 does not mean that the petrol contains just iso-octane and heptane in these proportions, but that it has the same detonation resistance properties. Because some fuels are more knock-resistant than iso-octane, the definition has been extended to allow for octane numbers greater than 100.
Octane ratings are not indicators of the energy content of fuels. (See section 4 of this page and heating value). It is only a measure of the fuel's tendency to burn in a controlled manner, rather than exploding in an uncontrolled manner. Where the octane number is raised by blending in ethanol, energy content per volume is reduced. Ethanol BTUs can be compared with gasoline BTUs in heat of combustion tables.


A US gas station pump offering five different (R+M)/2 octane ratings
It is possible for a fuel to have a Research Octane Number (RON) more than 100, because ISO-octane is not the most knock-resistant substance available. Racing fuels, avgas, LPG and alcohol fuels such as methanol may have octane ratings of 110 or significantly higher. Typical "octane booster" gasoline additives include MTBE, ETBE, isooctane and toluene. Lead in the form of tetraethyllead was once a common additive, but its use for fuels for road vehicles has been progressively phased-out worldwide, beginning in the 1970s.[3]
Measurement methods[edit source | editbeta]

Research Octane Number (RON)[edit source | editbeta]
The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.
Motor Octane Number (MON)[edit source | editbeta]
There is another type of octane rating, called Motor Octane Number (MON), which is a better measure of how the fuel behaves when under load, as it is determined at 900 rpm engine speed, instead of the 600 rpm for RON.[1] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON, however there is no direct link between RON and MON. Normally, fuel specifications require both a minimum RON and a minimum MON.[citation needed]
Anti-Knock Index (AKI)[edit source | editbeta]
In most countries, including Australia and all of those in Europe, the "headline" octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI, and often written on pumps as (R+M)/2). It may also sometimes be called the Pump Octane Number (PON).
Difference between RON and AKI[edit source | editbeta]
Because of the 8 to 10 point difference noted above, the octane rating shown in Canada and the United States is 4 to 5 points lower than the rating shown elsewhere in the world for the same fuel. This difference is known as the fuel's sensitivity,[4] and is not typically published for those countries that use the Anti-Knock Index labelling system.
See the table in the following section for a comparison.
Observed Road Octane Number (RdON)[edit source | editbeta]
Another type of octane rating, called Observed Road Octane Number (RdON), is derived from testing gasolines in real world multi-cylinder engines, normally at wide open throttle. It was developed in the 1920s and is still reliable today. The original testing was done in cars on the road but as technology developed the testing was moved to chassis dynamometers with environmental controls to improve consistency.[5]
Aviation gasoline octane ratings[edit source | editbeta]
Gasoline used in piston aircraft common in general aviation have slightly different methods of measuring the octane of the fuel. Similar to AKI, it has two different ratings, although it is referred to only by the lower of the two. One is referred to as the "aviation lean" rating and is the same as the MON of the fuel up to 100.[6] The second is the "aviation rich" rating and corresponds to the octane rating of a test engine under forced induction operation common in high-performance and military piston aircraft. This utilizes a supercharger, and uses a significantly richer fuel/air ratio for improved detonation resistance.[4]
The most commonly used current fuel 100LL, has an aviation lean rating of 100 octane, and an aviation rich rating of 130.[7]
Examples[edit source | editbeta]

The RON/MON values of n-heptane and iso-octane are exactly 0 and 100, respectively, by the definition of octane rating. The following table lists octane ratings for various other fuels.[8][9]
Fuel RON MON AKI
hexadecane < -30
n-octane -10
n-heptane (RON and MON 0 by definition) 0 0 0
diesel fuel 15–25
2-methylheptane 23 23.8
n-hexane 25 26.0 26
1-pentene 34
2-methylhexane 44 46.4
3-methylhexane 55.0
1-heptene 60
n-pentane 62 61.9
requirement for a typical two-stroke outboard motor[10] 69 65 67
Pertamina "Premium" gasoline in Indonesia 88 78 83
"Regular" gasoline in Japan (Japanese Industrial Standards) 90
n-butanol 92 71 83
Neopentane (dimethylpropane) 80.2
"regular" gasoline in Australia, New Zealand, Canada and the US 91–92 82–83 87
Pertamina "Pertamax" gasoline in Indonesia 92 82 87
Shell "Super" in Indonesia 92
n-butane 94[11] 90.1
Isopentane (methylbutane) 90.3
Pertamina "Pertamax Plus" gasoline in Indonesia 95 85 90
Shell "Super Extra" in Indonesia 95
Shell "FuelSave " in Malaysia 95
"EuroSuper" or "EuroPremium" or "Regular unleaded" in Europe, "SP95" in France 95 85–86 90–91
"Premium" or "Super unleaded" gasoline in US (10% ethanol blend) 97 87-88 92-93
Shell "V-Power 97" in Malaysia 97
Shell "V-Power 98", Caltex "Platinum 98 with Techron", Esso Mobil "Synergy 8000" and SPC "LEVO 98" in Singapore 98 89–90 93–94
Great Britain, Slovenia and Spain, "SP98" in France 98 89–90 93–94
"SuperPlus" in Germany 98 88
Tesco "Momentum^99"[12] in UK 99 87
"Premium" gasoline in Japan (Japanese Industrial Standards) 100
Pertamina "Pertamax Racing" in Indonesia 100
Shell V-Power in Italy and Germany 100 88
Eni(or Agip) Blu Super +(or Tech) in Italy 100 87 94
IP Plus 100 in Italy 100
Tamoil WR 100 in Italy 100
San Marco Petroli F-101 in Italy(northern Italy only, just a few gas stations) 101
Petro-Canada "Ultra 94" in Canada [13] 101.5 88 94
Aral Super 95 in Germany 95 85
Aral Super 95 E10 (10% Ethanol) in Germany 95 85
Aral SuperPlus 98 in Germany 98 88
Aral Ultimate 102 in Germany 102 88
IES 98 Plus in Italy 98
2,2-dimethylbutane 93.4
2,3-dimethylbutane 94.4
ExxonMobil Avgas 100[14] 99.5 (min)
Shell "V-Power Racing" in Australia - discontinued July 2008 [15] 100
"isooctane" (RON and MON 100 by definition) 100 100 100
benzene 101
i-butane 102[16] 97.6
"BP Ultimate 102 - now discontinued"[17] 102 93–94 97–98
t-butanol 103 91 97
2,3,3-trimethylpentane 106.1[18] 99.4[18] 103
ethane 108
2,2,3-trimethylpentane 109.6[18] 99.9[18] 105
toluene 121 107 114
E85 gasoline 102-105 85-87 94-96[19]
propane 112 97
2,2,3-trimethylbutane 112.1[18] 101.3[18] 106
xylene 118 115 116.5
isopropanol 118 98 108
methanol 108.7[20] 88.6[20] 98.65
ethanol 108.6[20] 89.7[20] 99.15
2,5-Dimethylfuran 119
methane 120 120 120
hydrogen > 130
Effects[edit source | editbeta]

Higher octane ratings correlate to higher activation energies: This being the amount of applied energy required to initiate combustion. Since higher octane fuels have higher activation energy requirements, it is less likely that a given compression will cause uncontrolled ignition, otherwise known as autoignition or detonation.
The compression ratio is directly related to power and to thermodynamic efficiency of an internal combustion engine (see Otto-cycle). Engines with higher compression ratios develop more area under the Otto-Cycle curve, thus they extract more energy from a given quantity of fuel.
During the compression stroke of an internal combustion engine, as the air / fuels mix is compressed its temperature rises (PV=nRT).
A fuel with a higher octane rating is less prone to auto-ignition and can withstand a greater rise in temperature during the compression stroke of an internal combustion engine without auto-igniting, thus allowing more power to be extracted from the Otto-Cycle.
If during the compression stroke the air / fuel mix reaches a temperature greater than the auto-ignition temperature of the fuel, the fuel self or auto-ignites. When auto-ignition occurs (before the piston reaches the top of its travel) the up-rising piston is then attempting to squeeze the rapidly heating fuel charge. This will usually destroy an engine quickly if allowed to continue.
There are two types of induction systems on internal combustion engines: Normally aspirated engine (air is sucked in using the engine's pistons), or forced induction engines (see supercharged or turbocharged engines).
In the case of the normally aspirated engine, at the start of the compression stroke the cylinder air / fuel volume is very low, this translates into a low starting pressure. As the piston travels upward, abnormally high cylinder pressures may result in the mixture auto-igniting or detonating, which is why conservative compression ratios are used in consumer vehicles. In a forced induction engine where at the start of the compression stroke the cylinder pressure is already raised (having a greater volume of air / fuel) Exp. 2 Bar (14.7Psi), the starting pressure or air / fuel volume would be 2 times that of the normally aspirated engine. This would translate into an effective compression ratio of 20:1 vs. 10:1 for the normally aspirated. This is why many forced induction engines have compression ratios in the 8:1 range.
Many high-performance engines are designed to operate with a high maximum compression, and thus demand fuels of higher octane. A common misconception is that power output or fuel efficiency can be improved by burning fuel of higher octane than that specified by the engine manufacturer. The power output of an engine depends in part on the energy density of the fuel being burnt. Fuels of different octane ratings may have similar densities, but because switching to a higher octane fuel does not add more hydrocarbon content or oxygen, the engine cannot develop more power.
However, burning fuel with a lower octane rating than that for which the engine is designed often results in a reduction of power output and efficiency. Many modern engines are equipped with a knock sensor (a small piezoelectric microphone), which sends a signal to the engine control unit, which in turn retards the ignition timing when detonation is detected. Retarding the ignition timing reduces the tendency of the fuel-air mixture to detonate, but also reduces power output and fuel efficiency. Because of this, under conditions of high load and high temperature, a given engine may have a more consistent power output with a higher octane fuel, as such fuels are less prone to detonation. Some modern high performance engines are actually optimized for higher than pump premium (93 AKI in the US). The 2001 - 2007 BMW M3 with the S54 engine is one such car. Car and Driver magazine tested a car using a dynamometer, and found that the power output increased as the AKI was increased up to approximately 96 AKI.
Most fuel filling stations have two storage tanks (even those offering 3 or 4 octane levels): those motorists who purchase intermediate grade fuels are given a mixture of higher and lower octane fuels. "Premium" grade is fuel of higher octane, and the minimum grade sold is fuel of lower octane. Purchasing 91 octane fuel (where offered) simply means that more fuel of higher octane is blended with commensurately less fuel of lower octane, than when purchasing a lower grade. The detergents and other additives in the fuel are often, but not always, identical.
The octane rating was developed by chemist Russell Marker at the Ethyl Corporation in 1926. The selection of n-heptane as the zero point of the scale was due to its availability in high purity. Other isomers of heptane produced from crude oil have greatly different ratings.
Regional variations[edit source | editbeta]

The selection of octane ratings available at the pump can vary greatly from region to region.
Colorado: State of Colorado is among a group of states where regular unleaded gasoline has a lower octane level (85) than is normal elsewhere in the country (87). Ref: http://www.aaa.com/aaa/006/EnCompass...r_AutoTalk.htm
Australia: "regular" unleaded fuel is 91 RON, "premium" unleaded with 95 RON is widely available, and 98 RON fuel is also reasonably common. Shell used to sell 100 RON petrol (5% ethanol content) from a small number of service stations, most of which are located in major cities (stopped in August 2008).[21] United Petroleum sells 100 RON unleaded fuel (10% ethanol content) at a small number of its service stations (originally only two, but it has now expanded to 67 outlets nationwide).[22][23] All fuel in Australia is unleaded.
Bahrain: 91 and 95 (RON), standard in all petrol station in the country and advertised as (Jayyid) for Regular or 91 and (Mumtaz) for Premium or 95.
China: 93 and 97 (RON) are commonly offered. In limited areas higher rating such as 99 RON is available. In some rural areas it can be difficult to find fuel with over 93 RON.
Chile: 93, 95 and 97 RON are standard at almost all gas stations thorough Chile. The three types are unleaded
Colombia: "Ecopetrol", Colombia's monopoly of refining and distribution of gasoline establishes a minimum AKI of 81 octanes for "Corriente" gasoline [24] and minimum AKI of 87 octanes for "Extra" gasoline.[25]
Cyprus: All fuel stations offer unleaded 95 and 98 RON and a few offer 100 RON as well.
Denmark: 95 and 98 RON are common choices. Some varieties of low percentage Ethanol mixtures are offered at larger gas stations. E85 is being implemented but has yet to be finalized in the parliament.
Ecuador: "Extra" with 87 and "Super" with 92 (RON) are available in all fuel stations. "Extra" is the most commoly used. All fuels are unleaded.[26]
Egypt: 80 RON is commonly used for all taxis and old cars and is the predominant rating in rural areas. 90 RON and 92 RON are available at almost all gas stations with a negligible price difference between them. 95 RON is becoming more common especially in the big cities and upscale suburbs. All fuels are unleaded.
Finland: 95 and 98 (RON), advertised as such, at almost all gas stations. Most cars run on 95, but 98 is available for vehicles that need higher octane fuel, or older models containing parts easily damaged by high ethanol content. Shell offers V-Power, advertised as "over 99 octane", instead of 98. In the beginning of 2011 95 RON was replaced by 95E10 containing 10% ethanol, and 98 RON by 98E5, containing 5% ethanol. ST1 also offers RE85 on some stations, which is 85% ethanol made from biodegradable waste (from which the advertised name "ReFuel" comes). RE85 is only suitable for flexifuel cars that can run on high-percentage ethanol.[27]
Germany: "Super E10" 95 RON and "Super Plus E5" 98 RON are available practically everywhere. Big suppliers such as Shell or Aral offer 100 RON gasoline (Shell V-Power, Aral Ultimate) at almost every fuel station. "Normal" 91 RON is only rarely offered because lower production amounts make it more expensive than "Super" 95 RON. Due to a new European Union law, gas stations are being required to offer a minimum rate of the new mixture of "Super" 95 RON with up to 10% Ethanol branded as "Super E10".[citation needed] Producers are discontinuing "Super E5" 95 RON with <5% Ethanol[citation needed] so cars that are unable to use E10 must use 98 RON petrol instead.
Greece (Hellas): 95 RON (standard unleaded), 97+ & 100 RON unleaded offered by some companies (e.g. EKO, Shell, BP). Also available Super LRP 96 RON for older (non-catalytic) vehicles.
Hong Kong: only 98 RON is available in the market. There have been calls to re-introduce 95 RON, but the calls have been rejected by all petrol station chains, citing that 95 RON was phased out because of market forces.
India: India's Ordinary And Premium Petrols are of 89–91 RON. The premium petrols are generally ordinary fuels with additives, that do not really change the octane value. Two variants, "Speed 93" and "Speed 97", were launched, with RON values of 93 and 97. India's economy-class vehicles usually have compression ratios under 10:1, thus enabling them to use lower-octane petrol without engine knocking.[citation needed]
Indonesia: Indonesia's "Premium" petrol rated at 88 RON and being subsidized it cost only about US$0.65/liter. Other options are "Pertamax" rated at 92 RON and the "Pertamax Plus" rated at RON 95. "Pertamax Racing Fuel", a bioethanol flexfuel rated at RON 100 (sold in gallon can container only)
Ireland: 95 RON "unleaded" is the only petrol type available through stations, although E5 (99 RON) is becoming more commonplace.
Italy: 95 RON is the only compulsory gasoline offered (verde, "green"), only a few fuel stations (Agip, IP, IES, OMV) offer 98 RON as the premium type, many Shell and Tamoil stations close to the cities offer also V-Power Gasoline rated at 100 RON. Recently Agip introduced "Blu Super+", a 100 RON gasoline.
Israel: 95 RON & 98 RON are normally available at most petrol stations. 96 RON is also available at a large number of gas stations but 95 RON is more preferred because it's cheaper and performance differences aren't very wide and noticeable. "Regular" fuel is 95 RON. All variants are unleaded.
Japan: Since 1986, "regular" is >=89 RON, and "high octane" is >=96 RON, lead free. Those values are defined in standard JIS K 2202. Sometimes "high octane" is sold under different names, such as "F-1".
Latvia: 95 RON and 98 RON widely available.
Lebanon: 95 RON and 98 RON are widely available.
Malaysia: Had RON 92 until 2009. Replaced with "regular" unleaded fuel Ron 95 RON, "premium" fuel is rated at 97 RON(but for Shell 97 RON is V-Power 97, and Shell's V-Power Racing is rated at min 97 RON.)[28]
México: Pemex Magna (87 AKI) is sold as a "regular" fuel and is available at every station. And Pemex Premium (92 AKI) is sold at almost all gas stations. Both variants are unleaded.
Montenegro: 95 RON is sold as a "regular" fuel. As a "premium" fuel, 98 RON is sold. Both variants are unleaded.
Netherlands: 95 RON "Euro" is sold at every station, whereas 98 RON "Super Plus" is being phased out in favor of "premium" fuels, which are all 95 RON fuels with extra additives. Shell V-Power is a 97 RON (labelled as 95 due to the legalities of only using 95 or 98 labelling), some independent tests have shown that one year after introduction[when?] it was downgraded to 95 RON[citation needed], whereas in neighboring Germany Shell V-Power consists of the regular 100 RON fuel.
New Zealand: 91 RON "Regular" and 95 RON "Premium" are both widely available. 98 RON is available instead of 95 RON at some service stations in larger urban areas.
Philippines: A brand of Petron, Petron Blaze is rated at 100 RON (the only brand of gasoline in the Philippines without an ethanol blend). Other "super premium" brands like Petron XCS, Caltex Gold, Shell V-Power are rated at 95-97 RON, while Petron Xtra Unleaded, Caltex Silver, and Shell Super Unleaded are rated at 93 RON.
Poland: Eurosuper 95 (RON 95) is sold in every gas station. Super Plus 98 (RON 98) is available in most stations, sometimes under brand (Orlen - Verva, BP - Ultimate, Shell - V-Power) and usually containing additives. Shell offers V-Power Racing fuel which is rated RON 100.
Portugal: 95 RON "Euro" is sold in every station and 98 RON "Super" being offered in almost every station.
Russia and CIS countries: 80 RON (76 MON) is the minimum available, the standard is 92 RON and 95 RON. 98 RON is available on some stations but it's usually quite expensive compared to the lower octane rating fuels.
Saudi Arabia: Two types of fuel are available at all gas stations in Saudi Arabia. "Premium 91" (RON 91) where the pumps are coloured green, and "Super Premium 95" (RON 95) where the pumps are coloured red. While gas stations in Saudi Arabia are privatized, the prices are regulated by the authorities and have a fixed at S.A.R. 0.45 (U.S. $0.12) and S.A.R. 0.60 (U.S. $0.16) per litre respectively. Prior to 2006, only Super Premium RON 95 was available and the pumps weren't coloured in any specific order. The public didn't know what Octane rating was, therefore big educating campaigns were spread, telling the people to use the "red gas" only for high end cars, and save money on using the "green gas" for regular cars and trucks.
Singapore: All four providers, Caltex, ExxonMobil, SPC and Shell have 3 grades of petrol. Typically, these are 92, 95, and 98 RON. However, since 2009, Shell has removed 92 RON.
South Africa: "regular" unleaded fuel is 95 RON in coastal areas. Inland (higher elevation) "regular" unleaded fuel is 93 RON; once again most fuel stations optionally offer 95 RON.
Spain: 95 RON "Euro" is sold in every station with 98 RON "Super" being offered in most stations. Many stations around cities and highways offer other high-octane "premium" brands.
Sri Lanka: In Ceypetco filling stations, 90 RON is the regular petrol and 95 RON is called 'Super Petrol', which comes at a premium price. In LIOC filling stations, 90 RON remains as regular petrol and 92 RON is available as 'Premium Petrol'. The cost of premium petrol is lower than the cost of super petrol.
Sweden: 95 RON, 98 RON and E85 are widely available.
Taiwan: 92 RON, 95 RON and 98 RON are widely available at gas stations in Taiwan.
Thailand: 91 RON and 95 RON are widely available. 91 RON benzine/petrol withdrawn on Jan 1st 2013 to increase uptake of gasohol fuels.
Trinidad and Tobago: 92 RON (Super) and 95 RON (Premium) are widely available.
Turkey: 95 RON and 98 RON are widely available in gas stations. 92 RON (Regular) has been dropped in 2006.
Ukraine: the standard gasoline is 95 RON, but 92 RON gasoline is also widely available and popular as a less expensive replacement for 95 RON gasoline. 80 RON gasoline is available for old cars and motorcycles.
United Kingdom: 'regular' petrol has an octane rating of 95 RON, with 97 RON fuel being widely available as the Super Unleaded. Tesco and Shell both offer 99 RON fuel. In April 2006, BP started a public trial of the super-high octane petrol BP Ultimate Unleaded 102, which as the name suggests, has an octane rating of 102 RON.[29] Although BP Ultimate Unleaded (with an octane rating of 97 RON) and BP Ultimate Diesel are both widely available throughout the UK, BP Ultimate Unleaded 102 was available throughout the UK in only 10 filling stations, and was priced at about two and half times more than their 97 RON fuel. In March 2010, BP stopped sales of Ultimate Unleaded 102, citing the closure of their specialty fuels manufacturing facility.[30] Shell V-Power is also available, but in a 99 RON octane rating, and Tesco fuel stations also supply the Greenergy produced 99 RON "Momentum99".
United States: in the US octane rating is displayed in AKI. In the Rocky Mountain (high elevation) states, 85 AKI (90 RON) is the minimum octane, and 91 AKI (95 RON) is the maximum octane available in fuel[citation needed]. The reason for this is that in higher-elevation areas, a typical naturally aspirated engine draws in less air mass per cycle because of the reduced density of the atmosphere. This directly translates to less fuel and reduced absolute compression in the cylinder, therefore deterring knock. It is safe to fill a carbureted car that normally takes 87 AKI fuel at sea level with 85 AKI fuel in the mountains, but at sea level the fuel may cause damage to the engine. A disadvantage to this strategy is that most turbocharged vehicles are unable to produce full power, even when using the "premium" 91 AKI fuel. In some east coast states, up to 94 AKI (98 RON) is available.[31] As of January, 2011, over 40 states and a total of over 2500 stations offer ethanol-based E-85 fuel with 105 AKI.[32] Often, filling stations near US racing tracks will offer higher octane levels such as 100 AKI[citation needed].
Venezuela: 91 RON and 95 RON gasoline is available nationwide, in all PDV gas stations. 95 RON petrol is the most widely used in the country, although most cars in Venezuela would work with 91 RON gasoline. This is because petrol prices are heavily subsided by the government(0.083$ per gallon 95 RON,vs 0.061$ per gallon 91 RON). All gasoline in Venezuela is unleaded.
Vietnam: 92 is in every gas station and 95 is in the urban areas.
Zimbabwe: 93 octane available with no other grades of fuels available, E10 which is an ethanol blend of fuel at 10% ethanol is available the octane rating however is still to be tested and confirmed but it is assumed that its around 95 Octane.
See also[edit source | editbeta]

Avgas
Cetane number
References[edit source | editbeta]

^ a b Werner Dabelstein, Arno Reglitzky, Andrea Schütze and Klaus Reders "Automotive Fuels" in Ullmann's Encyclopedia of Industrial Chemistry 2007, Wiley-VCH, Weinheim.doi:10.1002/14356007.a16_719.pub2
^ Kemp, Kenneth W.; Brown, Theodore; Nelson, John D. (2003). Chemistry: the central science. Englewood Cliffs, N.J: Prentice Hall. p. 992. ISBN 0-13-066997-0.
^ "Leaded Gas Phaseout". U.S. EPA, Region 10. 6 1995. Retrieved 2012-06-15.
^ a b http://www.vintagebonanza.com/octane.htm
^ http://www.runyard.org/jr/CFR/OctaneExplanation.htm
^ www.txideafarm.com/unpublished_blend_paper.pdf
^ http://www.aviation-fuel.com/pdfs/av...md910_2011.pdf
^ Petroleum and Coal, Purdue
^ Balaban, Alexandru T. (1983). "Topological Indices based on Topological Distances in Molecular Graphs" (PDF). Pure and Applied Chemistry (IUPAC) 55: 199–206.
^ Johnson Operation and Maintenance Manual, 1999
^ [1]
^ http://www.tesco.com/Momentum99/prod...fits-specs.asp
^ Octane & Other Gasoline Basics
^ Exxon Mobil Avgas product description
^ Shell phases out V-Power Racing fuel (100 RON) – MRT
^ Energy Citations Database (ECD)
^ BP Ultimate 102
^ a b c d e f A. T. Balaban, L. B. Kier, and N. Josh, MATCH (Commun. Math. Chem.) 28 (1992) 13–27.
^ Changes in Gasoline IV, sponsored by Renewable Fuels Foundation
^ a b c d 'Impact of alcohol–gasoline fuel blends on the performance and combustion characteristics of an SI engine'. doi:10.1016/j.fuel.2010.01.032.
^ http://en.wikipedia.org/wiki/Shell_V-Power
^ http://www.unitedpetroleum.com.au/index.asp?pgID=65
^ http://www.unitedpetroleum.com.au/di...-locations.asp
^ http://www.ecopetrol.com.co/contenid...16&conID=37366
^ http://www.ecopetrol.com.co/contenid...16&conID=37367
^ http://www.arch.gob.ec/index.php/des...-935-2012.html
^ VTT ja St1 kehittävät uutta vähäpäästöistä liikennepolttoainetta, VTT
^ http://www.petrolworld.com/asia-head...l-in-2009.html
^ http://www.bp.com/liveassets/bp_inte...ss_release.pdf
^ http://www.bp.com/sectiongenericarti...tentId=7060376
^ Products – Retail Marketing
^ Growth Energy Market Development
Further reading[edit source | editbeta]

SAE standard J 1297 Alternative Automotive Fuels, Sept 2002
Khoo, Kenny K. Understanding Octane and its Related Components. Yellowknife: Smithsonian Press, 2006.
External links[edit source | editbeta]

Octane ratings of some hydrocarbons
Petroleum and Coal
Gasoline Refining and Testing
Information in general
Why are Octane levels important
Gasoline FAQ
How Octane Works at HowStuffWorks.com

BMWMOA
Never ride faster than your Guardian Angel can fly
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2007 K1200LT Storm Grey metallic
Uni Go Trailer
Chayside is offline  
post #17 of 23 Old Sep 13th, 2013, 12:13 am
Senior Member
 
sheldan2's Avatar
 
Join Date: Mar 2005
Location: kings mountain, NC, usa
Posts: 2,099
Re: Octane Booster

http://www.autozone.com/autozone/acc...er=516074_0_0_

This is what I use every once in a while, the bike seems to like it.

Courage doesn't always roar. Sometimes it is the quiet voice at the end of the day saying " I'll try again tomorrow".


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
sheldan2 is offline  
post #18 of 23 Old Sep 13th, 2013, 1:51 am
Senior Member
 
fpmlt's Avatar
 
Join Date: Jan 2008
Posts: 2,175
Re: Octane Booster

I make my own using Xylene, acetone and synthetic 2 stroke oil. You can also use ATF in place of the 2 stroke oil. Seems to work well, 'specially on my HD which runs like crap on regular. Carries me over when travelling the back country where only regular is available.
fpmlt is offline  
post #19 of 23 Old Sep 13th, 2013, 12:45 pm
Lifetime Supporter
 
Voyager's Avatar
 
Join Date: Jun 2007
Location: Lawrenceville, PA, USA
Posts: 7,146
Re: Octane Booster

To the ________ (put your own word here as mine isn't fit to print) who pasted a short wiki novel here, did ya ever hear of a URL?

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Voyager is offline  
post #20 of 23 Old Sep 13th, 2013, 3:23 pm
Senior Member
 
Join Date: May 2013
Location: Leduc , Alberta , Canada
Posts: 296
Re: Octane Booster

That's me
1) Yes I have heard of URL's
2) You didn't have to read it all if you didn't want to
3) Bite me

BMWMOA
Never ride faster than your Guardian Angel can fly
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

2007 K1200LT Storm Grey metallic
Uni Go Trailer
Chayside is offline  
post #21 of 23 Old Sep 13th, 2013, 7:26 pm
Lifetime Supporter
 
Voyager's Avatar
 
Join Date: Jun 2007
Location: Lawrenceville, PA, USA
Posts: 7,146
Re: Octane Booster

Quote:
Originally Posted by Chayside
That's me
1) Yes I have heard of URL's
2) You didn't have to read it all if you didn't want to
3) Bite me
Q.E.D.

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Voyager is offline  
post #22 of 23 Old Sep 13th, 2013, 7:30 pm
Senior Member
 
Scouter-50's Avatar
 
Join Date: Apr 2012
Location: Columbus, Texas, USA
Posts: 1,286
Re: Octane Booster

Quote:
Originally Posted by fpmlt
I make my own using Xylene, acetone and synthetic 2 stroke oil. You can also use ATF in place of the 2 stroke oil. Seems to work well, 'specially on my HD which runs like crap on regular. Carries me over when travelling the back country where only regular is available.
Care to post a formula?

Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Scouter-50 is offline  
post #23 of 23 Old Sep 13th, 2013, 7:53 pm
Lifetime Supporter
 
johnbaker15's Avatar
 
Join Date: Sep 2010
Location: Chelmsford, Ma, USA
Posts: 1,595
Re: Octane Booster

Quote:
Originally Posted by Voyager
Q.E.D.
Had to look that one up....


Q.E.D. is sometimes jokingly claimed to abbreviate "quite easily done". Q.E.D. can also be used to ridicule the specious reasoning of another person by mockingly attaching it to the end of a poor argument, which was not in fact successfully demonstrated or presented.

John Baker

2005 BMW K1200LT
1979 Suzuki GS1000E
1978 Honda CB350
1975 Suzuki GT380
johnbaker15 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW Luxury Touring Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
correct octane twincruise RT Series 4 Sep 28th, 2010 5:46 pm
Pinging even with High octane Gas and Octane boost pries K1200LT 7 Apr 14th, 2009 9:38 pm
Improvements from Octane Boost calyrider K1200LT 3 Jan 2nd, 2008 4:51 am
85 & 87 Octane messenger13 K1200/1300GT (The Next Generation) 23 May 21st, 2007 10:06 pm
85 / 87 / 89 Octane in LT? deputy5211 K1200LT 33 May 18th, 2007 8:02 pm

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome