What is the way to mix RC fuel?

Mix 10 to 20 percent nitro and 8 to 16 percent oil for engine sizes 12 to 18. Increase the percentage of nitro for larger engines. For example, engine sizes 21 to 27 should have 20 to 40 percent nitro and 8 to 18 percent oil.

Not using the right amount of nitro decreases the efficiency of the engine, making it run poorly. The opposite is also true, and adding too much nitro can cause the engine to run too hot. The engine size plays a major role in the right fuel mixture, but people should also consider factors like humidity, climate and glow plugs.