What viscosity of oil does this group recommend for a 6.2L diesel? I
normally use SAE 30, but am thinking I should switch to something else.
Seems nowadays they are coming out with motor oils that are formulated for
diesels, but I do not want anything fancy like those synthetic oils. Been
thinking of this for oil pressure reason. At idle, it is at 35-40 psi, when
on the highway, not sure the rpm as I do not have a tach (yet), it is about
45-60 psi. Any suggestions here? Thanks.