Is 91 octane gas ethanol free?
Thereof, is all premium gas ethanol free?
Some people fill their small engines with premium gas based on the mistaken notion that all premium gas is ethanol free or that it'll help the engine run better. In fact, 95 percent of all gas sold in the United States (regular, mid-grade and premium) contains ethanol.
Accordingly, what gas is ethanol free?
The short answer is, no, ethanol-free gasoline is not bad for your car. Most cars today can run on ethanol gas blends up to E15 (15% ethanol) and on non-ethanol gasoline. And flex fuel vehicles can handle up to E85 (85% ethanol) without a problem.
E10 fuels are approved for usage in lawn mowers and outdoor power handhelds like chainsaws, trimmers, and leaf blowers. Gas with higher concentrations of ethanol is not. Ethanol will start to absorb water over time, leading to poor engine performance. E10 gas absorbs up to 50 times more water than standard gasoline.