well almost any good 2 stroke synthetic should be good I know the Yamalube racing 2 stroke oil is good. I have never kept an engine for 30 gallons I seem to find people who want them more than I do. hehehe. but I have worked on motorcycles for a good while now. used to have a shop but it took up too much time..at least thats what my wife said..but anyhow I am constantly checking over stuff I may pull the motor apart and see if I can get higher quality bearings for the motor.