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      01-14-2013, 11:33 PM   #5
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Drives: bimmer
Join Date: Jan 2007
Location: CHICAGO

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Originally Posted by cwg View Post
I find it hard to beleive that the DME no longer adjusts for lower grade gas with the cobb in place. The knock sensor and pulling of timing is a basic function of how the DME works. Agreed you should run the recomended 93 with the cobb but I don't beleive that cobb would have removed this basic function from the DME when they did their tune.
That was my guess as well. I want to avoid having to reflash the car to the sport map and then back to aggressive. I figured if the combustion was adjusted I could put in a couple of gallons of 91 until I get to a 93 octane pump and not have to really worry much.