Leaner engine operation…higher operating and component temps…decreased CO emissions…higher idle speeds…increased NOx emissions…erratic operation…complete stalls with E15 and E20 gasoline blends. Look for more details upcoming here on poweretblog and in the Jan/Feb. issue of Power Equipment Trade, but I’ve just gotten my hands on the impressively titled “Effects of Intermediate Ethanol Blends on Legacy Vehicles and Small Non-Road Engines, Report 1,” a study prepared by the National Renewable Energy Laboratory for the U.S. Dept. of Energy, and want to share some of the results.

First—this is a looooong 136-page report, complete with a serious number of eye-glazing charts and