After-Run Engine Oil is formulated to protect your engine while it's not being used. It prevents gumming and rust, extends engine life and help your engine start easier. The oil comes in a convenient 2-oz. squirt bottle that can be used for a prime bottle after it is empty. DIRECTIONS: -After running engine, simply put a few drops in the engines carb or glow plug port and turn engine by hand a few times. This will coat the engines internal parts and protect them from corrosion.