Good advise here. The fuel for the nitro cars is not suitable for RC airplane engines. It has too high a nitro content. You will want a fuel with 10% nitro and 18% oil content. A good engine is an OS 46AX. You can get some that are cheaper, but for a reliable and user friendly engine that also happens to have great power the 46AX can't be beat. Its also great for any 40-46 size sport plane if you want to swap your engine out after training. http://www2.towerhobbies.com/cgi-bin...?&I=LH5811&P=1[8D]