It is the gas that contains the ethanol. It is less expensive to buy. When I quote gasoline prices in my area, I am referring to gasoline containing ethanol.
Ok, I see now. The ethanol isn't bought separately.
I checked and they mix it into gas here these days, a minimum of 5 percent. Hadn't thought about it previously.
I try to wait until the gas light goes off, because we get discount points from Kroger and I want to make sure I get as much of the cheap gas as possible.