No idea if it's the same with cars but with 2 stroke motocross bikes if you rag the shit out of your bike out of the box you're likely to get a bit more power but have a lot shorter life expectancy of the engine. Best way to run in a race bike as you get more power but the piston isnt used for long anyway so ragging it doesnt matter. However if you're running in a bike to ride alot and want it to last longer its best to run it in gently.

HTH

Probably doesnt help one single bit though