after my last post you guys mentioned i should be running sae 30 weight on my 56 235 so i swapped out the 20-50w for Rotella T sae 30 and i noticed a drop in oil pressure. with idle set at 800rpms i got 10-15lbs of psi, reving to 3k gives me about 25-30 and it really wont go above that. with 20-50w i had a solid 35lbs at anything above 2k and upwards of 50 or so above 3k. what gives?
