everyone was recomending 300k to me. i wasnt going to be racing though, but wouldnt hurt to give it a try. it even says in a spot on here somewhere (link in another thread) to use 300k. and that was for a pro slash 2wd racer. i just tried some wheel bearing grease in mine and im still not happy with how loose it is. ill deffinately be modding mine in the future or just buying a sealed diff and running much heavier oil.