Originally Posted by f1anatic
I will get 28-30 mpg with the Jeep (3.6L V6) at 60 mph on cruise control and relatively flat ground, at 700 feet above the sea level but I doubt you guys will see 39 mpg under the same conditions. No doubt you'll get a few mpg better(30-35), but not 33% better.
Why not 33%? The diesel design is thermodynamically 30% more efficient than a gasoline engine. And gas motors can't run as lean as they should due to emissions tuning needed to fire the cats. To be fair, I get a little less than 39 at 60 in your same scenario...not by much though.
Remember that diesel has more BTUs per gallon also so higher efficiency and more energy per gallon too. Our motor is also smaller. ☺
Oh yee of little faith!
The founder of JeepGarage.org, Scottina06, has a son Max who is in need of corrective surgery from an infection at birth that left one leg 4 inches short. We need to support our Jeep brothers. His family has started a fund on giveforward.com. If you have ever been helped by someone else, now is a good time to pay it forward. Here is a link to that page. God bless you! http://gfwd.at/1rz33PW