350 Chevy oil pressure?
My race motors, in gear with an automatic, will go as low as 15, or 20 lbs., at idle, but jump right up to about 40lbs., right off idle. They max at around 50lbs., warm. Cold is another story. I pin the needle, at 100, on warm up. The ideal pressure for a small block, is 40 lbs. More than that will wash out the bearings. At idle, 20 will be fine. Remember, there is an accuracy issue, when it comes to electric gauges, as well. Mechanical, are always your best choice.