[cadillac_al]

Your oil pressure is going to be pretty high with a new tight engine. If you don't like seeing you roil pressure gauge pegged you should stay with 10w30 and see how you like it. I'm going to try 5w30 this year. My mains are at .003" and the oil pump is supposed to be a stock oil pump but I have my doubts. My pressure is always very high when cold and never gets below 30psi at idle when hot. If the pressure gets too high when cold it will bypass the filter which isn't good.