So nothing has improved since the 833 was designed? That is just plain silly. Lubrication has improved an hundred fold in the last 4 decades. Time to do some research and catch up.
All I'm saying is if you don't need it don't do it. If you feel it's worth the cost to you for whatever you gain, have at it.
BTW, I use that wonderful stuff in my Ram differential, the Mobil 1 Synthetic LS. Some folks were touting with this stuff friction modifier isn't necessary. Turns out the modifier is in fact necessary. Imagine that.
