You will find out that, generally speaking, standard fuels will work just fine with most applications. There are some exceptions. Some prefer the higher nitro content and have good reasons for that (some Heli flyers, some pattern folks, and so on) but for general sport flying, you can't go wrong with what you have.

Add nitro, price goes up accordingly. Some of that stuff is outrageously priced. I normally pay about $11.00 per gallon or so for my fuel and it works out just fine, S&W 15% nitro with 20% mixed castor/turbine oil.

DS.