dirtroad2ExplorerNov 17, 2014oil for 8.3LcumminsCan I use Rotella 5w-40w synthetic in place of Rotells 15w-40w in the cummins 8.3L
AdminModeratorNov 18, 2014Please do not multiple postSee thread running here.AdminRV.netpigman1ExplorerNov 17, 2014Go into your engine book and see what outside temp ranges is recommended for which weight oil. Off the top of my head, I don't know but operating in a very cold climate, it may be OK. Read the bible. THey know.
pigman1ExplorerNov 17, 2014Go into your engine book and see what outside temp ranges is recommended for which weight oil. Off the top of my head, I don't know but operating in a very cold climate, it may be OK. Read the bible. THey know.
