If Rings Don't Seat:

[bobcowan]

I overhaul my engine every 2 seasons (racing). More often if I break it. This is the break in procedure I use with every new engine. I never have problems with excess oil usage.

- fill with any cheap 5W-30 dino oil, use a quality filter. Start and run the engine in the garage for a couple of heat cycles. Dial in timing and idle, check for leaks, etc.

- Replace oil and filter with cheap 5W-30 oil and a Purolater Pro-1 filter. Go through a couple of heat cycles on the street. Accelerate and decelerate on a closed throttle quite a few times. Get the fuel mixture correct, timing correct, adjustments for drivability, etc. Again, check for leaks.

- Replace with whatever oil is your favorite. I like RP 5W-30. If I could get a RP 0W-30, I'd probably use that. Drive it like you stole it.

Here's a good discussion about oil viscosity:Looking for Oil recommendations...