2 vs 4 stroke fuel
Can you tell me what is the main difference between 2 and 4 stroke glow fuel? I bought a 15% nitro glow fuel that has 20% oil (synthetic and castor blend) and used this to begin the breakin of a OS 91 4-stroke. The label on the fuel doesn't specify that it is either 2 or 4 stroke fuel, but I've read some threads on various forums talking about 4 stroke fuel. What's the difference and did I do my 4 stroke harm by using the fuel as listed above? Thanks