I have used it in my vehicles wheel bearing and u joints with no problems. I prefer using Lucas Oil's grease that they have out. It's red in color and I mix a little Militec 1 oil with it before applying. I have not had any issues doing that either. The Lucas grease is really really tacky and strong and get's everywhere, so it is definitely going to stay in the bearings which is what you want. The added Militec 1 oil helps out.