What is E10? Most gas in America is 10% ethanol (distilled corn alcohol) and 90% gasoline. It’s the “Standard Edition” fuel.

What is E15? It’s the “Value Pack.” It’s 15% ethanol. It’s usually about 25 cents cheaper per gallon, but because it has more alcohol, it’s slightly less powerful.

Headline makes it seem like it’s a crazy thing to do, but it’s just the E88 fuel you can get at many gas stations already. Slightly less fuel economy but a lot cheaper. Add more ethanol and you get FlexFuel. E88 works for most cars made after 2001 I believe.