FE Turnaround: Disappointment to Satisfaction, 2010 Yaris. Almost +50 MPH. Thank You!

[Yaris Hilton]

Originally Posted by STC

Yes, you are correct... a mandate was passed for requirement in minimum amounts of Ethanol during the Bush watch. I know there is a push to up the amount to 20% blend. My question is... doesn’t a vehicle have to be re-fitted to run this concentration?

I expect a new Yaris will run on anything up to E25 without problems. I doubt they make special fuel systems just for the ones they export to Brazil. The company doesn't currently approve of using anything over E10 at present in the U.S. The EPA recently sponsored tests indicating that any cars built since 2000 ought to do fine with E20. Last year I read a fellow's post here, on the Toyota Nation or Clean MPG boards, I forget which, about his experiments blending E85 with E10 in his Yaris. It ran fine up to something over 40% ethanol, when it began to set lean mixture codes. I know many people have an almost religious fervor against ethanol in gasoline and believe it will cause terrible automotive disaster, but I've used E10 much of the time since 1977 in cars and motorcycles old and new, and never had any problems. It's more of an issue for outboard motors, 2-stroke powered lawn equipment, chainsaws and such using premixed oil.