oil pressure question

Rusty, and s'cuder, Thanks for the excellent answers. As for the oil, I am currently running the Rotella t4 with the stp additive. The reasoning is the Rotella reduced the zddp, and the stp has it, so, just tryin to keep the zddp levels up. And the oil pressure....

I had 32 years in the motor oil business, so I stand by my recommendation. But it's your car so you need to be comfortable with what you're doing. So, if you want that much ZDDP, try to get an oil with it already in there. I don't want to go into a long dissertation, but additives can do more harm than good, and are best avoided.
Valvoline VR1 is a high ZDDP oil, and is probably the most widely available. Others are sold by PennGrade/Brad Penn, Joe Gibbs Driven, Amsoil, Lucas. Maybe Redline and Royal Purple.