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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > newbie Question about mixing racing fuel w/ 91 octane



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      07-10-2012, 06:17 PM   #1
tagon
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newbie Question about mixing racing fuel w/ 91 octane

Hey guys i know that people have probably asked about this already but what benefit (HP, cleans engine, etc...) do i get if i mixed, lets say 5 gallons of racing gas with 91 octane? or is there a better mix? or should i even attempt to mix?

is it ok to mix it once in a while or should i be mixing it all the time?

Thanks
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      07-10-2012, 07:44 PM   #2
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Quote:
Originally Posted by tagon View Post
Hey guys i know that people have probably asked about this already but what benefit (HP, cleans engine, etc...) do i get if i mixed, lets say 5 gallons of racing gas with 91 octane? or is there a better mix? or should i even attempt to mix?

is it ok to mix it once in a while or should i be mixing it all the time?

Thanks
On a stock car there is a slight HP advantage over 91 octane as you will be able to run without the risk of knock and keep your ignition up. However, I would consider it a waste of money.

If you have 5 gallons of 100 octane and 5 gallons your effective octane is 95.5.

On a tuned car you can run a higher boost map with race gas.
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      07-11-2012, 12:56 AM   #3
tagon
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I have a Procede so i guess i can run it on map 2. Someone was telling me that i can clean out my engine from any carbon deposits do you know anything about that? or is that true?
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