Put Mobil 1 in both Camaro rear ends last summer, a 70 and an 88. While the cover was off I pulled the axles and put in new axle seals then. Had to replace the pinion seal in the 88 last month, replaced both axle seals in the 70 yesterday and the pinion seal is leaking a little too, and I just looked at the 88 and there's drop of oil on the backing plate, it's leaking already too at the axle. Have to figure this lube is probably not worth the trouble, time, and money. Figure I've spend about a hundred bucks on lube, seals, and cover gaskets. Hate to just drain it out and put regular lube in but that's looking like the way to go.