Quote:
Originally Posted by roosterk0031
Topped off the Cobalt this morning, calculated E66 blend. Put 10 miles after top off no CEL. Last tank with E55 somewhere between 39.8 indicated and 42.3 calculated, higher than expected, based on my E0 baseline of 45 mpg, E55 should have about 80% of the btu content and get 36 mpg.
Previous tank was same blend and 36 mpg, but also had quite a bit of AC usage so wasn't typical driving.
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Fascinating, are you going to go all the way to E85? I would expect MPG to peak at some point, regardless of driving conditions/technique. But apparently the computer can handle E85 if you slowly work up to it. Is that what you're doing now?