Well I finally got my first clone engine , it is a new Greyhound 6.5 from Harbor Freight that came on a three wheeler that I bought . It seems like it runs good and has good power .... but do these engines last or are they a short lived engine ?? I always said that I would not have China Clones till they were proven runners but it came on a trike and I am going to run it to see what it is like .what weight oil do they like ?? anyone have any favorite oil they run in them ?? Any other tricks that make them run longer ?? Thanks