"Blueskies" wrote

Most of the mogas STCs don't even require 'premium'

While that is true, some do. Extra octane does not hurt an engine, other than
perhaps causing slightly less HP, unless the engine is tuned with advanced
timing to take advantage of the octane.

Most or perhaps all Rotax that are become very popular with the LSA crowd need
premium. If you are going to go to a bunch of effort to get clean gas, might
as well get some that everyone can use, right?

After all, the gallon of premium at the pump goes for about 20 cents per gallon
more than regular. Compare the price of premium unleaded to 100 LL, and it is
still a bargain.
--
Jim in NC