Does 91 gas have ethanol?
Then, does unleaded 91 contain ethanol?
The numbers are what matters: Standard unleaded petrol is 91. Premium unleaded is both 95 and 98. The ethanol-blended E10 (a mixture of up to 10% ethanol in petrol) is a substitute for 91 in most cars.
Subsequently, question is, 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.
Correspondingly, does all gas have ethanol?
Almost all gasoline now has some ethanol in it. Our Exxon and Mobil branded gasoline currently contains up to 10%. Gasoline with 10% ethanol content is known as E10, and with 15% ethanol it's known as E15. Ethanol flex fuel (formerly known as E85) has between 51 and 83% ethanol with the remainder being gasoline.
How can you tell if gas is ethanol free?
To determine if ethanol is in the gas:
- On a test tube or olive bottle six or seven inches long, make a permanent line about two inches from the bottom.
- Fill with water to this line, then fill the tube to the top with gasoline.
- Cover the tube, agitate it, and let it stand.