2006 chevrolet duramax 4x4 fuel mileage? - yahoo answers, I have a 06' chevy duramax 4x4 and i hear from a lor of people that they are getting about 18 miles per gallon! then i ask what they get when towing a rv. Duramax mileage - 22 mpg? - diesel forum - thedieselstop., Frankly this is a nit with me, i'm tired of people claiming these high mileage numbers! can you help with this argument. i don't have any data to. Diesel mpg & fuel efficiency | duramax engine, Gmc offers a variety of vehicles with superior fuel efficiency when it comes to diesel mpg..
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