RC gasoline engine oil = motorcycle 2T engine oil. You can get it at any motorcycle shop. Just tell them you need 2T motor oil to mix with gas. For breakin I am not sure which engine you get. But if your engine is Zenoah (or similar ring piston engine) not much breakin is necessary. Usually we just let it idle for one tank. Let it cool, start it and start adjusting the niddle an run it at full speed.