Oil pressure and Oil viscosity

[CHANMADD]

Wait a minute......a multi garde oil ....10w60....is a SAE.10.oil with additives to make it lubricate like a SAE 60.When the additives break down you're left with a 10 weight oil. Very thin, 5 weight is like water. In our old engines I prefer 20w50. This is why with multigrades oil changes are essential.

[marco246]

Cobra53,

I, too, have a sbf, a 302 stroked to 347. The engine builder recommended 15W-50, 20W-50, or 15W-40. I don't track the car, other than for an occasional autocross, so I use Chevron Delo 15W-40 year-round. (I live in Hawaii).

At idle (850 rpm) with a warm engine (oil at least 180 deg F), the gauge shows 40 psi. On the road at 2000 rpm, it makes 50 psi. At cold start, it makes 60 psi.

These measurements seem "normal" to me. I think you could safely lower your motor oil viscosity to a xW-40 or xW-50, take some new readings, and adjust from there if necessary.

Cheers!