[darkpuppet]

if you're going to use ethanol in a sled, you should be mixing it with a different oil, such as castor oil -- take a lesson from the R/C crowd on that one.

e85 can work, and even though it's less efficient than gas, it also has benefits as being produceable locally.

e85 isn't a bad thing, but like CFLs, I don't think all the research has been done, and it'll take a while for technology to address all the unique problems introduced by e85.