RE: After-run oil question
Squirting the oil directly into the carb does a much better job. Going through the fuel nipple and needle valve puts very little into the engine. The biggest reason RevGQ doesn't have rust problems is he runs the engine dry. Another little item; There is NO methane in our fuel. Methane is a gas. As a matter of fact it's the main constituent of natural gas. Our fuel is METHANOL (the simplest alcohol) lubricant, and NITROMETHANE a complex nitroparafin.
Pulling the fuel line from a two cycle engine and letting run dry then trying to start it until it quits popping is the best way to make sure your bearings don't rust. A good shot of oil down the carb or into the cylinder guarantees they will last a long time.