Join Date: Aug 2009
Location: Washington, the state
There is nothing wrong with E10 (10% ethanol alcohol & 90% gasoline). As noted above, it can absorb more moisture than pure gasoline, so use a stabilizer during long term storage. Does your bike really need premium gas? If your owners manual says so, do it. Otherwise you're just wasting money. In the U.S. and Canada regular is 87 A.K.I. (antiknock index, which is the numerical average of Research Octane Number and Motor Octane Number). Other countries use the RON which shows a higher number for the same gas.
E15 is not recommended in vehicles made before 2001 due to the rubber compounds in the fuel system. It is problematic in vehicles made later except flex fuel vehicles made for mixtures up to 85%.
Ethanol does reduce gas mileage. It also is the least toxic way to raise the octane and to reduce carbon monoxide emissions.
"Older people who are reasonable, good-tempered, and gracious will bear aging well. Those who are mean-spirited and irritable will be unhappy at every period of their lives.
"Let each of use properly whatever strengths he has and strive to use them well. If he does this, he will never find himself lacking."
Marcus Tullius Cicero