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I'm using the Cobb Aggressive v401 Beta map on my 08 135i.
Filled the tank to 3/4 with Cali 91 OCT, and rest of the 1/4 tank with E85. Approx 10.5 Gallons of 91 OCT & 3.5 Gallons of E85. Should be about 95 oct in the tank. It's my first time running Aggressive and I can notice a difference vs the sport map.
I've read that it's fine to use as an octane booster and that's exactly what im
doing.
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