My blaster had a head gasket and base gasket leak, and I fixed both of those problems and it was running great and had no trouble but after a while I noticed there was oil by the base gasket where the exhaust port is and I was wondering what could cause that ? Also I have supreme gas mixedd with yamalube 32:1 and it was running good but u also noticed it started to bog and run rich ?? Idk why ?? Also while I was cleaning the carb I noticed I was mixed a peice on the inside??