like it ays are they pretty close or would i get more out of one? thanks

 

I'm gonna say it's probably gonna be pretty close. The manuals take less power to turn but their overdrives are geared lower than the automatic's overdrive is.

 

my dad 06 six speed gets 22 to 25 mpg while my 04 and 07 autos get 13 to 15

 

I got a 6 speed 05 and i get 17-19 highway pulling i get 13-15. I have been using my dads 06 auto and been getting 10-12 pulling and 14-16 not pulling. They say a manual will get better mileage than an automatic.

 

ill agree with manual being a little better

 

My 06 Dodge quad cab long bed 4x4 auto, would get 20-21 unloaded doing 70 when I traded it off at 36,000 miles. I think there are too many variables to worry about besides what transmission it has.

 

Empty I can get 20.5 mpg at 55-60 MPH but at 70-72 MPH its down to 18.5+ mpg. Oh all of my fuel mileage numbers are hand calculated not from the overhead computer read out that can be off by 2-10 mpg.

 

My 2005 Dodge 2500 2wd, auto, 3.73 geared gets 18.5 city/highway combined and 14 pulling a 5500# travel trailer. (hand calculated, not the trip computer)

 

I just got back from a 630 mile round trip up and down through the Texas Hill Country ... running with cruise control at 62, got 19.2mpg. (Hand calculated with 25% bio-diesel) ('07 5.9 auto Quad cab, 4x4)

Does running the AC make any or much difference?

 

it might be a small difference. nothing huge. I don't care enough about getting that last nth of a mpg to turn my AC off so I don't know for sure.