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Discussion Starter #1
I have a 2001 S4 and I put 95 octane gas in it (or the highest rating the station has to offer). I noticed that the station that I fill up at mostly has "racing fuel" at 100 octane. I thought about it, and then reasoned maybe it's better I mix it half/half with a tank of 95, then I thought, will it be ok with my engine with only 2500 miles on it?
Thoughts?
 

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Re: Hight Octane Gas (res_)

I wouldn'd do it.
I don't know the technical reasons, but your car won't run any faster with the race gas.
 

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Re: Hight Octane Gas (res_)

I wouldn't do it, simply because I'd probably become addicted to the "heroin" enhanced gas. I know others with chipped S4s run that gas with their special 100 octane race programming.
 

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Re: Hight Octane Gas (S4inSoFla)

occasionally I'll mix 110 octane with the local 94 octane stuff.. about 4 gallons of the 110 to a tank.. I wouldn't go any higher
 
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