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Originally Posted by look 171
Can anyone go into a local airport and buy aviation gas? Can we run them in our cars (no cat)? What's the difference between Aviation and no lead race gas?
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In answer to your first question, it is illegal for use in on-road vehicles. Most airports will not sell it to anyone who wants to pump directly into their vehicle. You may need to bring jerry cans. Answer to Question 2 and 3... Avgas has different additives. It should not harm your pre-cat automobile. It may harm your wallet.
Quote:
Originally Posted by dmcummins
I could save big time if I could get ethanol free gas for my plane. There are two airports in the area that have it for about $1.50 cheaper than 100LL. It just doesn't pay me to make a special trip there to fill up.
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IIRC, both issuers of the STCs require you to test every batch of auto gas to assure there is no alcohol. People have encountered stations selling e10 as "alcohol free". Maybe it was a slip up with the distribution truck, or maybe they were shoring up their profits. But it's your ass in the air, so I suggest you test.
Also, keep in mind that automotive fuel from the pump is NOT the same everywhere you go. There are summer blends, winter blends, geographical blends within the seasonal changes, varying levels and types of oxygenates (not just ethanol) and when tanks are switched over a mixture of "in between".
Unleaded Fuels: Airworthiness by Design - Lycoming