the problem will be with the piston rings,they will gum up with oil,carbon deposits,and then the rings will stick,losing compression,and,when you pull it over it will drag oil up and fill the bore up,tip it out,clean it out with petrol,and then put a little diesel or 3 in one oil down the plug port,turn the engine slowly a c ouple of turns,leave it a while,then tip it out,getting it all out,drain the oil,put new oil in with a new plug,it'll be ok,hopefully,lol.