My 292 has a stock pump, small cam, 4 bbl and headers, so it is not a high performance and doesn't need the oil pressure you guys are running.
I used dino oil for the break in four years ago, but have used 5-30 mobil 1 since then. The truck oil pressure gauge has no numbers, just hash marks. The needle is above the middle mark when going down the road and below middle at idle.
I only ran 10-40 in it before the rebuild and it had 200,000 miles on it then.
I for one don't see the need for big pumps or 20-50 oil on an engine that is expected to last.
I read something from a guy that sells lubricants for a living. He ran a test on his own cars. He measured the time it takes for a cold engine to build oil pressure. He determined that it took 60% longer to build full pressure with 20-50 than it did with the 15-40 he had been running.
An engine experiences more wear at cold start up than the next hundred miles down the road.
