I'm trying to figure out what grease I should use for the Rally VXL for the outside of the Front Differential where it meets the drive shaft. Traxxas support just said to use a light grease but couldn't give me an example or brand. My local hobby shop recommended Grim Racer Speed Grease but its for boats. Online people seem to use various stuff but a few seem to recommend the Mobil 1 synthetic grease but not sure if this is good for RC applications. So not real sure what I should use yet. Any recommendations?