What is the perfect pit stop on f1 2010?

A Perfect pit stop is something that many f1 teams dream of. For all practical purposes a perfect pit stop is one that is completed within 3-5 seconds (for a stop without refuelling) and within 8-10 seconds (with refuelling) wherein the driver comes in and stays stationery for as less time as possible. The Mercedes team and Ferrari team are known for their exceptional pit stop efficiency.