Jeff, the fuel sold under the Hobby People label doesn't state on the can what it is but they advertised it as 18%, this is there 15% nitro fuel, I didn't look at the can of the other %s. The cans look like just Wildcat with a label change, WC is just 16% oil. I add 2% Klotz to it just to be safe. Whatever I'm doing my engines seem to like it but better safe then sorry.
Gene