[eXceed]

I've had it from an engine engineer at a high volume company that develops supercharged 5.0 V8's and he said that it's a myth about 'running in' as all performance engines are run in at the factory.

He said the only thing that you could potentially run in gently is the gearbox, so floor it everywhere but let it smoothly change gears.

Do what you like at the end of the day as it's your car, and bear in mind that whatever you hear from salesmen and the guys in the showrooms is likely to be a load of rubbish (it's an old fashioned way of thinking...).

EDIT - ALWAYS let the engine warm up before high RPM applications!