Well, petroleum gelly for the motor at least. It has a wicking action similar to the old saponified greases and it is a must for the motor bearings. I have yet to try The Featherweight Shop's special motor grease. Gears can probably benefit from teflon and enhances smoothness of synthetic greases. Go for oil when it's an option; the only two brands I have noticed any improvement on the basic oil are Trilflow and Finish Line Ceramic Wet lube. I have tried lots of brands, but not every single one out there.