[wombat7]

The reason I said try to stay away from the highway is so that you can guarentee the varied engine revs. How many people are going to jump on the highway and leave the car in 3rd gear? Not very many. The biggest thing when breaking in any car is very the engine speed. If you can do that and drive on the highway great, but the temptation to just put it in 5th or 6th and just drive may be too much for some people. If you leave the engine at a certain speed for too long the rings will not seat right and you will have big problems down the road.