Anyone know what type of grease I should be using? Can I just use the same Mobil 1 grease I use for my bearings?
Mobil 1 would not be a very good product, it will attract dirt and cause more harm than good. What would work better is a dry lube such as a PTFE spray. This is also the same lube that should be used if you have Schwintek slides.
I believe that Lippert recommends white lithium grease for zerk fittings.