Guys another oil Q. from me. Which weight of Amsoil do you use in rear and front end ? In my rear I now have synthetic 75W-140 from dealer. Amsoil don't have same weight, only 85W-140. In front is still factory oil, what ever weight it is. Do I need to put in LS additive, if I will use Amsoil in rear end ?
THX
M
THX
M
