I have used Wildcat 2 and 4 cycle , 15% nitro for years (made by Byron fuels) but it has become difficult to get lately. Now I use S & W 4 cycle , 15% nitro fuel. They can be contacted at (610) 252-2024 or on line at
www.s-whobby.com This fuel is around $23/ gallon when bought in quantity. Jimbo