I agree with PA, but a major difference on the clutch break in though. Those things need to be babied more than the engine does. Not at a steady pace though, as he mentioned. Drive like your right foot has a twitch. Don't hold a steady pace at all. Go up and down by 5-10 MPH constantly on the highway and try to do more city driving than anything.
As far as an engine is concerned... let it heat up once, then cool down and change the oil. Then... refill and HAMMER IT!!! Break 'em in hard, they run hard is my motto!
