I only ask this because I've been running it on 30W non-detergent oil, driving up and down hills, doing plenty of engine braking, etc... and i did the compression test on the motor today,and it had 180psi on all four cylinders. I think that means my piston rings are all holding perfectly, and that its broken in...


Sound about right??


EDIT: the other reason why i ask is because i kept reading, and i thought that supposedly engines werent FULLY broken in until after 1500 - 2000 miles, and thats the time to switch from 30W to the standard 5W30 or 10W30...?