I’m using stock pump. My pressure goes up to 42 when rpm goes up. But when warm it’s 8 to 10. I ran 10/30 oil and was told to run straight 30 and when it’s cold I’m getting 18 or more at idle. As soon as normal operating temp hits oil pressure goes down to 8 to 10 at 700rpm . Low mileage rebuild . Should I run 20 50 to increase pressure?oil pressure rises with rpm revs.
