It is always a good idea to use some after run oil. To use after run oil, let the tank run completely empty at idle until it runs out of fuel (try re-starting the engine several times with the glow igniter installed). Next put a few drops of after-run oil down the carb (hold it open) and a few drops down the glow plug hole. Leave the plug out and put a rag over the top of the engine. Spin the engine over for five seconds on the starter box. Put a few more drops down the carb, re-install the glow pug and spin the engine over five more seconds. You’re done!