M wrote:
Robert M. Gary wrote:
I think less than 20% of U.S. population living in areas where
oxygenated gasoline are required, and it covers less than 15% of the
area. Oil companies will be foolish to put this expensive stuff in
gasoline where it's not mandated.

That's useful to know only if you carry a current guide to fuel
formulas with you. I know of no such guide. I'm not sure how you would
know what fuel was safe.