What kind of ecomodder....? Funkhoss for one.
ecomodder.com/forum/showthread.php/90-day-average-over-90-mpg-37847.html#post626937
Quote:
There's one additional factor that wasn't on my list of "mods" that I'll mention before I do: we run ethanol-free gas 100% of the time. We live in a very rural area, but it turns out that there's a small convenience store that sells ethanol-free gas only one mile from our house. They have ethanol-free because we're also just a few miles from a lake. The ethanol free gas they sell is 93 octane "premium," though. Their "regular" gas has 10% ethanol. So, because of this I have the ignition timing advanced a bit more than I could if we used regular gas, since premium is less likely to exhibit spark knock. It's not a huge factor, but it does help some.
The Little Car - '00 Chevrolet Metro
90 day: 91.08 mpg (US)
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It's a little bit of a hack, like using Imperial gallons.