RE: nitro fuels
Every engine you own will like a different fuel best. Most of us find a fuel that works well enough in all of our engines so that we don't have to lug 4 different jugs to the flying field.
I bought 4 gallons of a fuel I'd never tried before. Not one of my engines will even run on the stuff and it's a name brand. The reason I bought it was because I had been using fuel with castor oil but I was tired of cleaning the stuff off my planes. So I bought fuel that was all synthetic.
I get that fuel to work by mixing another fuel with it 50/50. Once it's gone I won't buy it again obviously. What I do plan to do is buy a gallon of several different fuels and try them out until I find one or two that I really like.
By the way, Wildcat premium extra 10 or 15% is excellent fuel but it's the stuff with castor. My engines love it but I hate cleaning it up.