Lets talk Gas mileage and trucks...

[Mudman]

   I think 15-20 empty and 10-15 towing is the norm.  Cummins seems to be slightly better than 8cylinders.  Mnts vs flatland also.60mph vs 75mph too!  I know Im over 20 on flatland at 60mph freeway and many are but as average it depends on driving and terrain and speed.  Regardless its way better than a gasser of equal hp.

[Special T]

Just got done driving 900 miles over 3 mountain passes with about 4500lbs in the back of the truck. I averaged 17.1 mpg Part of that is because i couldn't keep my foot out of it on the way home and did 70 which really sucks down the mileage. I do a fair amount of freeway driving so the things that affect MY mileage the most are these. RPM/speed Diesels have a sweet spot that really give you great mileage if you can stay in that range mine is 16-1800 RPM with stock tires that only allows about 62mph. I have slightly taller tires in the works. Filters Air and Fuel I think the fuel is really important on a diesel it affects wear a lot and also your mileage, most people don't change them enough they are really pretty cheap when you figure out how much extra diesel it costs you. Air resistance If i keep my stuff below the cab of my truck with just the truck or towing a trailer i get better mileage, just less drag

I recently read in a magazine for commercial fleet owners that DRIVING HABITS Make up a HUGE % of mileage inefficiency. Accelerate slow and smooth and decelerate the same way...

I could have likely hit mid 19's if i had kept my foot out of it on the way home, AND i may need to change out my air/fuel filters
03 Dodge cummins 2wd stick dually 5 in exhaust  stock filer with a 2micron back up for fuel , I plan on increasing my OD by 5-10% and i'm looking a getting a Titan Fuel tank. 80 Gal Tank that Goes in the factory location...

[MarkyMark]

Anyone use a throttle body spacer to improve mileage? Just wondering if it truly works.

[huntandjeep]

Anyone use a throttle body spacer to improve mileage? Just wondering if it truly works.

. I have one on my Jeep that came with my cold air intake And it did nothing for mileage.

[kevinlisa06]

My daily commuter is a 1999 Dodge 2500 Cummins 5 speed. I average right around 17-18 running around town but out on the open highways I get 22mpg. This past elk season I got 17mpg pulling the 5th wheel over to camp. Keep up the maintenance and fuel treatments and they will treat you good is my motto. I have just over 233,000 miles on her now.


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[demontang]

1999 extcab f250 with the 7.3 and auto. With a fuel leak towing my 23ft trailer I got 10mpg. Running around town I got 13-16mpg depending on idle time I had to keep everyone warm watching baseball tryouts   now that my fuel leak is fixed im up to 14 towing and havent ran around with out the trailer yet.

My 97 expedition with a 5.4 got 13 highway and 9 towing the trailer. Best tank I had was 16

[raydog]

1997 s10 blazer 4.3 auto. 31 inch tires. I get 16-19 highway if I behave.

[T-Dozzer]

Newer model 4 door tacoma. 2 inch lift with bigger tires, 4 ltr v6.
Get around 20 mpg
Got rid of my big truck & never looked back!

[j_h_nimrod]

2001 F150 Screw. 5.4 Triton. Lucky to get 13 mpg at highway speeds. I moved from 285-75r16 to 235-85r16 just to test mileage change and found no difference. Pretty disappointed in mileage but better than a Tundra or Titan.

[WA hunter14]

2001 F150 Screw. 5.4 Triton. Lucky to get 13 mpg at highway speeds. I moved from 285-75r16 to 235-85r16 just to test mileage change and found no difference. Pretty disappointed in mileage but better than a Tundra or Titan.

are you sure? my uncle has a tundra and says he gets 17.

[Alchase]

I hear people all the time say their Dodge Ram or Durango or Dakota with a 4.7 gets over 18 MPG.

My 2001 Durango 4.7, gets 14-15 with a tail wind going downhill in neutral.
My 2002 Ram 4.7 quad, got 12-13 with a tail wind going downhill in neutral.
My 2007 Dakota 3.7 v-6 quad, gets 15, average no matter how I drive, LOL

Ya I thought I would save some gas money commuting, not so much 

[Curly]

My 2002 Ram 4.7 quad, got 12-13 with a tail wind going downhill in neutral.

My wife's 2WD 2002 Ram Quad cab 4.7L regularly got 18 mpg.  Driving to NM a couple different times, we would even get almost 20 mpg. 

[Dhoey07]

I hear people all the time say their Dodge Ram or Durango or Dakota with a 4.7 gets over 18 MPG.

My 2001 Durango 4.7, gets 14-15 with a tail wind going downhill in neutral.
My 2002 Ram 4.7 quad, got 12-13 with a tail wind going downhill in neutral.
My 2007 Dakota 3.7 v-6 quad, gets 15, average no matter how I drive, LOL

Ya I thought I would save some gas money commuting, not so much 

For what it's worth my 98 3.9 5 sp Dakota got 17.5 combined

[Alchase]

I probably should have said those are monthly averages according to the trip computer.

[thinkingman]

I had a Durango 4.7 that couldn't break 14mpg and I didn't drive it that hard.
My current 2006 Tacoma doublecab 4X4 with a 6sp manual gets 17mpg city or highway and I short-shift and max air pressure in the tires.
The engineers for the 6sp manual hopefully lost their jobs....2400rpm at 70mph is ridiculous.