> General av is seen as a backwater that is barely hanging on and couldn't possibly get the lead out. The issue is infrastructure. Modern engines run fine on u

> General av is seen as a backwater that is barely hanging on and couldn't possibly get the lead out. The issue is infrastructure. Modern engines run fine on unleaded fuel, but the little airstrips in the middle of nowhere all have 100LL and/or jet fuel, so that's what pilots use. I know a few pilots who are prefer to use unleaded in their Rotax engines to prevent spark plug fouling, and they have to jump through some pretty ridiculous hoops to get gas, while their buddies just fill up with whatever is on the field.