now have 2 gear lubes to experiment with and determine which works the best to solve the problem at hand. In my case nothing I tried (MT 90, Amsoil series 2000 75w 90, Mobil 1 syn 75w 90, Valvoline Syn 75w 90) worked better than the Royal Purple Max Gear 75w 90. Also I am getting the least amount of magnetic fudge on the drain plug with the Royal Purple.