Quote:
Originally Posted by dorian
so i just tanked up with 50L of shell 93 and did some logging versus my usual 94 chev fuel that i use. Exactly the same timing pulls across cylinders in the same gear with the same IATs. Ill do some more testing in the upcoming weeks to see if there is any kind of difference once the gas stations cycle through a few tanks of 93. So far, no difference
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I'm just going with my butt dyno, when I filled my M3 with the 93 with ~1/4 tank Shell 91 left in it, the car felt better and the hesitation was one.
I am at 1/2 tank left right now and it feels like some of the hesitation is back. I plan on giving it another tank or 2 to completely flush out the old 91 and see if it's anything.
I hope it's not a placebo or just some perfect running conditions. I don't plan on tuning the car ever (its got enough power) but running perfect vs the car hesitating on a stock tune is still worth the premium imo.