My brotherinlaw gave me his little Honda mini tiller, said it just stopped running. I brought it home and the oil was black as coal! Changed the oil about six times...it only takes 2.7 ozs to fill the crankcase! Put in a new plug and it started on the first pull! It smoked like a chimney for a while. I noticed the plastic engine cover was missing. I got the cover from him and put it on...feeling the cover was off for a while, which would cause it to run a while and then get hot and cut off. It still smokes a little but runs good and starts good. It's probably running on borrowed time but I think I will run a 15w50 synthetic in it which might buy it some more time. What do you guys think? Thanks,G-man