[GordonGeesey]

I bought a '65 GTO with a newly-built 400. I got all the paperwork on the engine build, and everything seems legit and done right (reputable builder, quality parts, etc). The guy I got the car from said that the engine builder favored oil volume over pressure. He said that the motor had a high volume oil pump in it. The engine paperwork specified the use of 30-weight oil ONLY.

Here's the thing; at cold-start the initial OP is about 80-85. Revving the stone-cold engine takes the OP to close to 100. The oil seems to warm quickly and settles to around 50-60 at cruise RPM after a mile or two.

But once fully warmed up, at 850rpm idle, the OP is only about 8-10psi. It is unsettling to see the hot OP that low. It goes up to 20-40 at cruise rpm when fully hot. The oil level is full, and the oil/filter are both fresh. No noises from the engine. It runs really strong

When I asked the previous owner if the seemingly low OP was normal, he stated "It has OP, right? Then don't worry about it". He said a full-warmed up engine in otherwise good condition doesn't need much OP at idle with no load on it.

Am I being paranoid, or is this a reasonable and normal explanation for my situation? Would love to hear people's thoughts....