Are there any users of E85 here?

I use it off and on depending on the gas prices. Pretty much as long as gas stays more than $0.50 more a gallon, it is break even with E85 use. More than that is cost savings. And less $ into the middle eastern economy is always a benefit...

Drivability is excellent. MPG is down roughly 2 mpg, sometimes as much as 3, on a bad day, 4. But never worse than 4 mpg loss.... Power is up a tad too.

And can anyone explain how GM handles E85 in the FFV vehicles? Do they use a separate E85 timing map, or just out of nature does it just use the high octane timing map?

Thanks!