Oil Filters, Bosch vs Purolator - BMW Luxury Touring Community
 
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post #1 of 29 Old Aug 11th, 2009, 12:18 pm Thread Starter
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Oil Filters, Bosch vs Purolator

I used the Bosch #72161 from Rock Auto and bought two at the time. I then went to the local Fleet-Farm (Man's Mall!) and took my Bosch filter in to see about a filter wrench to remove the old. I found a CTA RiteFit #A251 wrench that fit perfectly and had a thin sidewall that fits inside the sump on my LT. It was $1.99 on sale and made of steel, not plastic. www.ctatools.com

Now the interesting part. While there I checked the Bosch and Purolator filter books and saw that the Purolator oil filter #L10241 was the listed filter in each book. So I took at look at the Purolator filter and guess what? They are exactly identical except the Bosch is black and the Purolator is white.

Now I'm not talking that they looked close. They were identical! They both had the same crimps, exterior and when I looked inside, both were identical to include the numbers stamped on the interior where the threads were (3 4 16 L). I mean that they have the same welds and stampings inside, outside and were manufactured at the same place!

The Purolator was under $3.00 and I was able to just pick it up and walk out the door without shipping or a wait. Sure the Purloator is painted a different color but with everything on these filters identical except the color of the paint, I'm sure they use the same type of paints.

Now I'm for using quality parts but the only difference is the name and exterior paint. I see no reason why I won't use a Purolator when I change next time.

John Jones
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post #2 of 29 Old Aug 11th, 2009, 12:32 pm
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Re: Oil Filters, Bosch vs Purolator

If it is white--is it painted?
You do not want a painted filter that sits in the oil sump-paint may come off and foul the engine. This is not an external filter like others.
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post #3 of 29 Old Aug 11th, 2009, 2:03 pm
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Re: Oil Filters, Bosch vs Purolator

is it painted?

Aren't all filters painted, or are we talking about powder coat vs paint.
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post #4 of 29 Old Aug 11th, 2009, 4:22 pm
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Re: Oil Filters, Bosch vs Purolator

While I am for saving money and this is one area that I think LT cost is over the top!

Only thing I always worry about is the internals and what PSI the bypass flapper valve is set at. One company may manufacture filters for a bunch of fitments but to the spec that each call for. Of course the manufacture process would look identical to each other. The specs are what matters and what filtration of particle it will filter or trap.

As far as painted I use Amsoil filters because if I am going to pay a premium, I want a premium filter, and paint has not come off of them that I have seen.

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post #5 of 29 Old Aug 11th, 2009, 5:10 pm
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by seahabit
is it painted?

Aren't all filters painted, or are we talking about powder coat vs paint.
In actuality the answer is no. The BMW specific filters only have ink on them to denote what they are when you pull them out of the box. I've seen other after market oil filters that are not painted also.

I use Bosch, BMW, and Amsoil filters. I've had experience with the other filters, so I stay with what I trust.

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post #6 of 29 Old Aug 11th, 2009, 6:51 pm
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Re: Oil Filters, Bosch vs Purolator

I've never seen paint soften or come off any filter from oil. The bypass pressure setting of the internal relief valve should never be called upon to do anything - unless the engine is shelling out & filling the sump etc with debris. In which case you have more serious problems than oil filter issues.

Otherwise engine oil filters generally don't have that fine a micron particle rating - typically about 15 microns nominal - ~ 40 microns absolute as I recall from my hydraulic days.
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post #7 of 29 Old Aug 11th, 2009, 7:27 pm
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by niel_petersen
I've never seen paint soften or come off any filter from oil. The bypass pressure setting of the internal relief valve should never be called upon to do anything - unless the engine is shelling out & filling the sump etc with debris. In which case you have more serious problems than oil filter issues.

Otherwise engine oil filters generally don't have that fine a micron particle rating - typically about 15 microns nominal - ~ 40 microns absolute as I recall from my hydraulic days.
5 micron on an Amsoil and I believe the BMW is 5 also.

HD is on 5 microns too I believe.

And if your relief valve is too lite, then most of your oil will bypass the filter and go unfiltered, not a good thing at all.

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post #8 of 29 Old Aug 11th, 2009, 7:37 pm
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by LAF
5 micron on an Amsoil and I believe the BMW is 5 also.

HD is on 5 microns too I believe.

And if your relief valve is too lite, then most of your oil will bypass the filter and go unfiltered, not a good thing at all.
That's probably a "nominal" (what is the filtering efficiency at 5 microns?) rating - not an absolute. A 5 micron filter in hydraulics to handle a few gpm has to be much larger - and hydraulics don't have such heavy oil in a start up situation.

Filter bypass is routine in engine cold start situations. Most of the oil blows over the relief valve under these conditions anyway.
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post #9 of 29 Old Aug 11th, 2009, 8:25 pm
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by LAF
5 micron on an Amsoil and I believe the BMW is 5 also.

HD is on 5 microns too I believe.

And if your relief valve is too lite, then most of your oil will bypass the filter and go unfiltered, not a good thing at all.
The BMW filters seem to be unique since they have a fine mesh screen in the bypass so that the bypass oil gets some filtration (but obviously not in the 10-40 micron range.
They also have a strong spring in the bypass valve.
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post #10 of 29 Old Aug 11th, 2009, 8:41 pm
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Re: Oil Filters, Bosch vs Purolator

From my limited experience with Purlator oil filters - over 90,000 miles between my 2002 LT, 1985 K100 and 1987 K75. I've had zero problems with the Purlators. I've never seen the paint come off of the filter body. I do change oil every 5K miles using good old dino GTX 20-50.

Some years ago Purlator made the Pure One without the grip coating - I'm upset because I did like the Pure One filter better, it had a better micron rating. My logic is change every 5K miles with dino oil - it does the engine good to keep fresh oil and filters in there.
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post #11 of 29 Old Aug 12th, 2009, 12:18 am Thread Starter
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Re: Oil Filters, Bosch vs Purolator

Didn't want to get anyone going about quality of fiters and I apologize if that's what happened. I just wanted to let some in on an observation and a possible alternative should some decide to give it a try.

In regards to the paint, one is painted white and the other is painted black. If anything were to come off on the exterior it should collect in the filter first before going onto the rest of the motor. But Ive never seen any paint come off of one before. Some even forgot to peal the sticker off of the Bosch and went back into find the sticker still intact.

When you look inside at the bypass valves or whatever they are, they were identical right down to the visible welds inside. I have no doubt that all the reputable brands out there meet similar high standards. Many folks have their favorites and by no means am I trying to talk anyone out of their own piece of mind. I don't want to confuse this like a oil thread as to who's is best and and what is junk. But this may be some useful info should a rider find themselves out somewhere and need a filter and oil for a quick change before getting back home. I mean when many get their oil at the -mart stores, they might be able to grab one of these filters too. It might get you out of a bind should a filter be needed.

As far as microns of filtration, heck if I know what is what. I'm the wrong guy to ask that and often been changing oil and filters on all my cars with what's been on sale. I just change my oil often and every car I've had has gone 120,000 miles or better.

As for K & N I've used those too and they are great filters!

I've also though I read somewhere that the Bosch filter #3331 also fits the LT and that happens to be a filter that fits my Regal. (I'm not saying the 3331 will work on the LT)

Again, just an observation and don't want to raise any hackles.

John Jones
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post #12 of 29 Old Aug 12th, 2009, 5:59 am
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Re: Oil Filters, Bosch vs Purolator

If you get your LT hot enough to melt the paint off your oil filter, I'm thinking you have been running too fast and are probably vaporized at this point................

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post #13 of 29 Old Aug 12th, 2009, 7:37 am
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Re: Oil Filters, Bosch vs Purolator

My stupid question of the day...

Do all of you run the OEM filters on your cars?? How is the LT engine different than the majority of the small car engines built today? Most of them are water cooled aluminum, DOHC engines also.

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post #14 of 29 Old Aug 12th, 2009, 8:08 am
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by bigbear
My stupid question of the day...

Do all of you run the OEM filters on your cars?? How is the LT engine different than the majority of the small car engines built today? Most of them are water cooled aluminum, DOHC engines also.

Roy
Roy the BIG difference is Most cars DO NOT have it's oil filter INSIDE the engine. It is on the OUTSIDE of the engine. So it DOES make a difference on what filter you use IN the LT.

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post #15 of 29 Old Aug 12th, 2009, 8:29 am
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Re: Oil Filters, Bosch vs Purolator

The PO of my bike ran the Bosch filter. When I did the first oil change I noticed some of the paint was off the filter so I have never used the spare Bosch filter he sent with the bike because of that. So what most of you are telling me is that the Bosch filter shouldn't normally do this.

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post #16 of 29 Old Aug 12th, 2009, 10:15 am
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Smile Re: Oil Filters, Bosch vs Purolator

Purolator ML16825 is unpainted with peel off label.
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post #17 of 29 Old Aug 12th, 2009, 11:50 am
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Re: Oil Filters, Bosch vs Purolator

Use the cheapest filter you can find. Don't worry about paint and microns and let me know when you hear about an oil or oil filter related failure on an LT.
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post #18 of 29 Old Aug 19th, 2009, 2:55 pm
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Smile Re: Oil Filters, Bosch vs Purolator

I had my local auto parts house order a Bosch 72161 and it came jet black and certainly looks like it is painted. Anybody else have that experience?

Denny
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post #19 of 29 Old Aug 19th, 2009, 6:31 pm
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Re: Oil Filters, Bosch vs Purolator

I got the Bosch 3330 at AutoZone and it was black and has a sticker on it. The STP filter that crossed with it had no backflow preventer in it. It was $6.49 but they were on sale with some Castrol 20W50.........

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post #20 of 29 Old Aug 19th, 2009, 7:39 pm
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by Spenceer
Purolator ML16825 is unpainted with peel off label.
What gives it the black color if not paint?

http://www.amazon.com/Purolator-ML16.../dp/B000ICNUSO

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post #21 of 29 Old Aug 20th, 2009, 5:54 am
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Re: Oil Filters, Bosch vs Purolator

Anybody know the difference between the Bosch 72161 and the Bosch 3331? Except for the obvious 68830 Bosch's? When I did the oi change I searched the forum for Bosch and came up with the 3331. It seems now that most are using the 72161? Did I do a Bad?

The black coating on the filter is either paint or powder coating and I guess that one just needs to either be comfortable with the coating not causing problems or use the BMW filter exclusively. The filter that came out was a BMW and was screen printed. I doubt the material used to put the information on th3e filter was ink but appeared to be yellow paint. True the filter is not coated in paint but there is a small amount of paint on the filter none the less Loren

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post #22 of 29 Old Aug 20th, 2009, 10:00 pm
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Re: Oil Filters, Bosch vs Purolator

I'm sure this link has been posted before but here it is,

http://motorcycleinfo.calsci.com/Fil...tml#OilFilters

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post #23 of 29 Old Aug 21st, 2009, 11:20 am
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Smile Re: Oil Filters, Bosch vs Purolator

purolator ML16825 is not painted and has a removable label

replaces BMW 11 42 1 460 845
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post #24 of 29 Old Aug 21st, 2009, 11:30 am
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Wink Re: Oil Filters, Bosch vs Purolator

purolator ML16825
I have a case of them and none of them are black. All unpainted
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post #25 of 29 Old Aug 21st, 2009, 6:56 pm
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by Spenceer
purolator ML16825
I have a case of them and none of them are black. All unpainted
Where did you but them? I've looked at several links that Google drummed up and every one shows a black filter for this model number.

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post #26 of 29 Old Aug 22nd, 2009, 10:31 am
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Re: Oil Filters, Bosch vs Purolator

I have been using the Bosh filters from beemerboneyard.com. For 40.00 you can get a 6 pack and for 5.00 more a complete set of crush washers and o-rings for 6 oil changes. Shipping is fast and cheap and service has been great.

http://beemerboneyard.com/11421460845c.html
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post #27 of 29 Old Aug 22nd, 2009, 10:49 am
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Re: Oil Filters, Bosch vs Purolator

My personal opinion is to go with BMW Filter. For a few dollars price difference, why take a chance???. You can still get BMW filters with 20% discount from Chicago BMW if you do not want to buy from your local BMW dealer.

Quote:
Originally Posted by RealWing
The BMW filters seem to be unique since they have a fine mesh screen in the bypass so that the bypass oil gets some filtration (but obviously not in the 10-40 micron range.
They also have a strong spring in the bypass valve.

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post #28 of 29 Old Aug 22nd, 2009, 12:13 pm
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Re: Oil Filters, Bosch vs Purolator

Quote:
Originally Posted by sigma1959
I'm sure this link has been posted before but here it is,

http://motorcycleinfo.calsci.com/Fil...tml#OilFilters
Excellent link, thanks for sharing!


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post #29 of 29 Old Aug 30th, 2009, 3:05 pm
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Re: Oil Filters, Bosch vs Purolator

A few bits of information, without recommendation:

Mobil 1 and K&N are the same filter; the difference is the nut welded onto the K&N, and the color. Both are made by Champion Labs

Purolator makes all their own filters, plus the Bosch filters available in the U. S. They make a bunch of other "brands" too. This is not to say that the Bosch is identical, but it also is not to say there are any differences.

The Amsoil filters are apparently made by Donaldson, a company which mainly makes extended-use filters, such as for big trucks; the idea being you can run your filter as long as your oil. Amsoil is a multi-level marketing scheme; make of that what you will.

You may find this link informative: http://tinyurl.com/kmbdob
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