I break mine in for about 4-5k miles. First oil change at 1k miles OR 2-3 hours of run time, whichever comes first. Second oil change about 1500 miles after that, and the third oil change around the 5k mark, as long as you don't see any metal flaking in the oil anymore, all should be well, if you do, extend the break in period for another 1500 miles or so. Vary the engine speed, but try to avoid long pulls to redline, an occational run in first won't hurt, but for the most part, you should drive it like an Italian grandmother [quickly, but still not full-tilt]