atk
Moderator
been using 5w40 Valvoline synthetic...so far so good
Our family has used Amsoil since the early 80's. I have it everywhere in my truck but the crankcase............I don't know why.
Ken.........how well does the bypass system handle diesel soot in the oil?
Regarding sludge I have pics of a Toyota Previa mini van valve cover at 200K miles using Amsoil. There was ZERO.........NADA..........NO sludge whats so ever.
Tbar