ORIGINAL: LANNYBOB

marvel mystery oil at walmart is all your need. if you want to put it in after you run your engine, then do so. by not putting it in wont cause any problems. put a little bit in the carburator (about a half tea spoon) and spin the motor with your electric starter for two seconds. of course do this with the glow plug ignitor off the glow plug. have fun breaking in your new engine. i love doing it.