Hey Pat, all our race engines are roller cammed, of course... We freshen them all in February-March prior to racing starting up again. Ok, for sure they'll all get new rod and main bearings, maybe a new piston here and there, sometimes a change to the current "trick of the month" club cam... Same crank, rods, etc. We use the break in oil and do about an hour's run time on the engine dyno, then it's in the car and on to the chassis dyno for setup and tuning. Once off the chassis dyno, we put in the Mobil 1 synthetic and call things ready.

Should we be running the break-in oil for a longer period, or are we doing it right? We've never had any serious engine troubles, and the machine shop doing the work is a sponsor so cost isn't really the issue either. Just wondering if a few passes on break-in oil would be better for the engines?