Pump & meth vs. E85

[jrohner]

The best mileage I've got on E85 was 23, the best on gas was between 25 & 26. Even in town I only lose a couple MPG's. I save like $10 per tank, and only lose a couple MPG's, I'm still saving money while making the most HP. I was running the stock o2 on gas, and was running my LC1 for closed loop when I got my best E85 mileage of 23, and it was set for around 11.5:1 (17.25:1 gas equiv AFR) and I was still using the 95 EPROM ECU at the time.

I've been running E85 for a few years in my DSM's and I've never noticed a difference in AFR's throughout the year, and I drive mine all through winter too. If you run closed loop it shouldn't change as open loop uses the high fuel trim (even though loggers don't show it that way), at least on 1g's and 2g's. I'm running full open loop now and I still don't see a difference, even though I'm sure the gas percentage has went up. One of these day's I'll test the fuel to see for sure.

[Tachyon]

At 370 stations serving E85, Minnesota has the largest capacity in the nation by far. I Recommend you take advantage of it... while you can.

I use my DSM only for personal entertainment. It is running on a stand alone in open loop only (~11.5 afr, 25* timing) I get 14 mpg with a heavy throttle and small turbo. At the same AFR, just cursing to Duluth, a few triple digit bursts here and there, I got 18 MPG. I am sure if I lean it out and increase the timing at cruising, I could do mid 20's (AWD). I haven't tried DD e85 though, so it might be a PITA scheduling fillups.