Octane or Ethanol - BMW Luxury Touring Community
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post #1 of 7 Old Apr 9th, 2017, 10:02 am Thread Starter
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Octane or Ethanol

The local gas stations have recently added ethanol free gas, but there's a caveat, it's only 87 octane. I know my RT doesn't like low octane gas and it's recommended to use premium, but I'm curious which you guys think would be better. Should I stick with high octane gas that has ethanol, or would it be better for the bike to switch to ethanol free low octane gas?

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post #2 of 7 Old Apr 9th, 2017, 1:27 pm
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Re: Octane or Ethanol

Definitely stick with the higher octane fuel. The octane rating is more important to your engine than the fact that ethanol has lower energy/gallon or are more harmful to rubber and plastic parts.

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post #3 of 7 Old Apr 9th, 2017, 1:29 pm
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Re: Octane or Ethanol

Quote:
Originally Posted by Whiskey View Post
The local gas stations have recently added ethanol free gas, but there's a caveat, it's only 87 octane. I know my RT doesn't like low octane gas and it's recommended to use premium, but I'm curious which you guys think would be better. Should I stick with high octane gas that has ethanol, or would it be better for the bike to switch to ethanol free low octane gas?
Personally I would go for the octane. I can easily replace degraded rubber components but engine damage is another matter. I have already replaced most of the rubber in contact with ethanol tolerant parts so I go for octane with no reservations.

Gordon
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post #4 of 7 Old Apr 9th, 2017, 3:27 pm
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Re: Octane or Ethanol

Octane for sure.
I run REC 90. That's in the range recommended by BMW.
If you really want to run ethanol free fuel at an octane lower than recommended then you can try this product.
A true octane booster. Requires mixing and it's not cheap.

Torco Accelerator - It's not just an octane booster

or this one is just as good.

Klotz Canada - Synthetic Lubricants

Both products have mixing ratio charts depending how much octane you want to make.

Best and easiest bet is use Super grade fuel with ethanol. If your concerned about the long term affect of ethanol then use this product it has good reviews.

Safeguard? Ethanol Fuel Conditioner With Stabilizers

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post #5 of 7 Old Apr 9th, 2017, 3:38 pm Thread Starter
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Re: Octane or Ethanol

Glad to hear this. My thought was that the octane rating was more important, but I wanted a sanity check to make sure that I want being stupid. Thanks for all of the input.

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post #6 of 7 Old Apr 10th, 2017, 11:42 am
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Re: Octane or Ethanol

I agree with the above. I would consider using the pure gasoline in the winter if you do not us up a tank in 5 or 6 weeks though. I am lucky as I can get premium 92 octane no ethanol in my town, I buy it often just to spite the Iowa corn farmers and their ethanol lobby.

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post #7 of 7 Old Apr 10th, 2017, 1:11 pm Thread Starter
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Re: Octane or Ethanol

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I agree with the above. I would consider using the pure gasoline in the winter if you do not us up a tank in 5 or 6 weeks though. I am lucky as I can get premium 92 octane no ethanol in my town, I buy it often just to spite the Iowa corn farmers and their ethanol lobby.
I live in GA, my bike doesn't sit longer than 2 weeks, and those only happen because I'm too busy to ride for a weekend.
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