5w30 10w30 10w40 and why ? I mean whats the reason you run the weight you do, is it thickness film strenth or some other reason.
David
David
turbowarwagon said:15w-40 rotella, i got a turbo sbc355 and i need the heavy stuff for the turbo bushings. and if you are running an older smallblock, one with a flat tappet cam, hydraulic or solid, you should be using a truck oil too, new oil lacks 90% of the needed agents and properties to keep a flat tappet cam from flattening itself out. lubricity..?