new engine break in

when i talked to the engine designer for the 07 cobra, i asked him about breakin and he said that they dont run them at the factory. he suggested using motorcraft oil for breakin changing at 500 miles, 1000 miles, 2000 miles then run synthetic starting at 3000 miles. my engine building instructor has people run the motors at 2000 rpm for 20 mins when they first run, then go up and down on the revs between 3000 and idle for a while to help seat the rings.

I would try to keep the RPM's down to a reasonable level, say nothing higher than 4K. WOT in the higher gears at lower RPM's will help seat the rings. No free revs, try too keep the engine as loaded as possible by "short shifting". 500-1000 miles is all you need to break in a modern engine. Change the oil after that and it's off to the races. Let's face it, the magazine guys who are testing these vehicles are NOT buying them and don't care how long they'll last. The magazines have deadlines and can't afford timewise to break in an engine even though the acceleration times are always higher with one. A properly broken in engine will last longer and use less oil in the long run.