2011 Ford Mustang V6 runs 776.5 miles on one tank, 48.5 mpg [w/Video]
* The 2011 Ford Mustang V-6 sets a new record by averaging 48.5 mpg on a track while completing 1,457 laps with an average speed of 43.9 mph
The 3.7 V6 can switch between atkinson cycle at part throttle and otto cycle at high load. Brilliant engine design.