I would never thrash a car for the first 1k. It's not just about the engine bedding in, what about suspension, brakes, chassis etc!? My old man used to build engines for a living on cars. He always took it easy for the first 1.k then slowly built the revs over a few hundred. Without question, his cars where the smoothest engined cars I ever went in! We used to test garage demonstrators of his car and they were truly rough as a badgers bum compared to his.
I know lots of people thrash them from knew - just hope I never buy a used car off them :dapprove: