When you drain the oil from the engine, take a wrench and slowly turn the engine over (with the plug out....), the oil pump actually holds a fair amount of oil from draining. When you refill the oil, only put in about 24-26 oz. Don't top it off because if you do, the engine will just blow it out the cam cover overflow and lube the outside of the engine. It never seems like there is enough in the engine, but the hose gauge should have some air space at the top of it. Good luck and have fun...........