If you can afford the million+ for the car and the insurance premiums... I highly doubt you'll even be caring about the gas pumps.
As for the McClaren F-1... the Pagani Zonda claimed the top speed record awhile ago. To top them all though, the brit built, 350 chevy powered Ultima GTR (about $100k, also available as a kit) currently holds the 0-100-0 record, which is considered to be the true measure of a sports car. The best McLaren road car they could send up to compete against those numbers would be chassis #073. It has an updated LM engine with 691bhp @ 7500 rpm & a one off "high downforce package".