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Re: Who sells the best quality gas?! (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Alex on January 10, 2000 at 10:41:27:

In Reply to: Re: Who sells the best quality gas?! posted by John Fries on January 10, 2000 at 08:30:09:

My M635 likes Sunoco 94 best as well. Even going to 93 causes a noticable drop in performance.

After a recent tuneup, I've come to the conclusion that 94 is optimal. I added some octane booster to see if that would make a difference since that tuneup, and it does nothing.


: Good point about the often misunderstood octane rating. Many people do in fact incorrectly assume that it is somehow a power rating. Having said that, the BMW specifies 96 octane for the s38 engine in the M6. Based on the differences between the european and american rating systems I believe that works out to 93 or 94 in the US rating system. I use Sunoco Ultra 94 in my M6 and this seems very good. I understand that Sunoco 94 is not available everywhere as it is here in western PA.



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