After evaluating supercars to see which could go furthest on a gallon of gasoline, the crew of Top Gear decided to try again. What they apparently set out to do was demonstrate the impact of driving behavior on fuel economy. All hypermiling enthusiasts will gladly expound on how modifying your driving style can take you above and beyond the EPA mileage ratings. Of course, Jeremy Clarkson had to demonstrate this by taking the negative approach. He pitted a Toyota Prius against a new BMW M3. No one would ever expect the 414hp V8 powered M3 to get better mileage than a Prius. Unless, of course, you pushed a Prius around a test track as fast it would possibly go and then pacing the hybrid with the M3. Not surprisingly, thrashing a Prius around a track for ten laps provides less than stellar mileage results. Check out the video after the jump to see if the Prius or M3 won this HYPO-miling contest.