Originally Posted by Crankycrank

I used to mix motor oil with grease to get the right viscosity as well if you don't want to invest in other lubricants. Viscosity is the most important thing as too light and the lube will leak out through the seals over time. Too heavy such as grease can prevent the pawls from moving freely and engaging the gear. If you ride in sub-freezing temps a lighter oil would be better but that would be the only situation I can think of.