Originally Posted by Chinchilla
manual calculation for MPG's for my 10 tanks of ethanol (had to make sure the ECM was dialed for the E85), I got about 12.5 miles per gallon on ethanol, and about 14.8 on average over the last 5 full tanks of gasoline.
E85 is $2.79 a gallon here in Sacramento
87 octane is about $3.49 a gallon
12.5 x 26 gallon tank= 325 miles per tank
14.8x26= 384.8 miles per tank
325/384.8= roughly a 16% difference right?
But 2.79/3.49= roughly a 20% difference..
It may seem that ethanol is more cost efficient, despite the large drawback of mileage per gallon. of course this isn't like a closed study, with controlled environments, but hey it gives a good idea of what my driving conditions fare with both versions of propellant. Just my two cents... Good luck on finding a programmer that works well, and report back with info, I'd love to get one that works with both.
ECM dialed for E85, does that mean your using a programmer? if so what brand?