I have toured a few auto assembly plants. If some of you guys saw what they do to a brand new engine, you prob wouldn't buy a new car. LOL. Cold start, bounce it off the rev limiter for about 5 seconds a couple times, then burn out half way across the assembly line. I guess they figure if it's gonna blow, they want it to do it before it gets to the dealer. Also I was a tech at several dealerships and it's pretty much the same drill when techs do pre delivery inspections. I don't go around banging it off the rev limiter when I get a new car, I just drive them like I normally would.