> The only reason F1 cars even have pit stops are for tires. No. The only reason F1 cars have pit stops is that the rules require it. For many years (e.g., all of Nigel Mansell's time) they didn't stop and refueling in the pits was explicitly banned. -- Phil Payne UK Audi quattro Owners Club Phone +44 7785 302803 Fax +44 870 0883933