I'm sorry Ma'am , I did not realize that you were a girl . :eek-surpriseHe's (hubby) is using synthetic oil in the tranny. He said he uses synthetic oil in everything
I use Mobil 1 synthetic in everything . 20W50 in motor....Dexron ATF in primary... 80W140 in transmission .We've used synthetic oil in all the maintenance's in the is...With age, should we change up to 80w140 or what about redline?