Probably because you are pumping ethanol into your car which has less energy.
This is a good read:
http://www.thestar.com/wheels/articl...rmance-engines
Quote:
Originally Posted by gareth12468
I've tried PetroCan 94 and all I can say it's not worth the money.....
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2013, AW, xDrive35i, M Sport
Package, Technology
Package, Dynamic Comfort
Package, Premium
Package, 3M Clear Bra, Euro foglight switch, a few coded fixes
