I would not worry too much if you have 10psi per 1000rpm & it is on rise when you rev it up. I have a BBC that hits 75 cold & goes down to 20 to 25 psi when hot @ idle. Never had a problem. I agree with the prior post though... the sae50 is some thick stuff. I have larger tolerances & tend to stick with the 20/50 which seems to work fine. Is the motor broke in?