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      03-29-2012, 09:44 PM   #25
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Drives: 08' 135i
Join Date: Aug 2008
Location: Australia, Perth

Posts: 5,029
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Originally Posted by shu View Post
95 for me..

I've pumped 4-5 consecutive tanks for 98.. didn't feel any power difference or notice any extra mileage. Went back to 95 after that. I don't see how a difference of 3 octane will do anything bad to the engine?
Could affect your timing - may not feel it though, need to do runs and log it.

Though it is probably ok for a stock car, would still go for 98 on a turbo car...
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