@7point82,

My testing gives the superfuel a slight (maybe 10%) advantage in the amount of cooking done, but I buy and use it because it is so much cleaner.

I don't know about my new XGK, but my old one went through many gallons of 80 octane avgas and quite a bit of 100 LL in AK. Lots easier to find when you were flying in (later I used a lot of Jet Fuel too). The avgas was dirty and required more cleaning but worked fine.

Used in my old SVEA, it clogged a lot.

The leaded gas was proscribed because the lead fumes were toxic. Unleaded is not so toxic, but I would still only use it outdoors.

The best,

Jerry