[bignastyGS]

Well, got the 12 hp all buttoned up in the 1200 but boy,what a smoker.It starts up so nice but I believe I hear remnants of a rod knock. I may be hearing things though as when it revs up,it quiets down. I thought I would try some Marvel Mystery Oil to maybe lubricate things up. On the bottle,it says to add 20%MMO of the total fluid level you need. I was thinking that seemed alot. How much do you use in your machine? Do you just use it in the oil or in gas as well??Does it make a difference at all? I am not expecting a brand new motor miracle out of it,just thought I'd hear opinions.