2011 Ford Super Duty versus Ram and Silverado to see which gas engine delivers the best fuel efficiency.<br /><br /><br /><img src="http://ll.broadbandsports.com/images/40623_thumb.jpg" alt="2011 Ford Super Duty - Challenge 6 | Gas Engine -- Super Duty Vs Ram and Silverado" title="2011 Ford Super Duty - Challenge 6 | Gas Engine -- Super Duty Vs Ram and Silverado" width="150" height="90" alt="2011 Ford Super Duty - Challenge 6 | Gas Engine -- Super Duty Vs Ram and Silverado"/>
