Diablow: I was thinking every car engine that rattles on startup should have a push button electric oil pump just to get the oil up so the cam chains ect will not rattle. My Ford explorer is a typical example. Read on the auto websites how many have this problem........ Now back to our RC engines.... I should say the piston, sleeve and rings is what really needs the break-in process. Many start ups is what I think helps this. As far as reading what you print here....I think it is great.... that anyone that takes time out, to look up and print how this breaking a engine in, or helping tune it...should be praised more. After all, helping one another is what it is all about. Love it. Captinjohn P.S. I did not major in english