after run oil? why would anyone use afterrun oil? Modern synthetics lubricants are perfectly capable of neutralising the acidic products of combustion. Your fuel has oil so after running the motor, let it cool a few degressand turn the engine over a few turns to push some fuel and lube through it. The fuel evaporates leaving the oil behind to neutralise the acid. So why do you need afterun oil?

well prop balancing like so many other practices seems like a good idea at the time but is absolutely useless on a single piston engine.....


But if it provides a feeling of security then theres no harm. However there is no strong technical reason for balancing small light weight props.

I'dbe more concerend with sharp edges that reduce efficiency and slice skin.