3rd Gen High Performance and Accessories (5.9L Only) Talk about Dodge/Cummins aftermarket products for third generation trucks here. Can include high-performance mods, or general accessories. THIS IS FOR THE 5.9L ONLY!
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View Poll Results: 5.9 Fuel Mileage
5-10
0
0%
11-14
11.86%
15-18
48.31%
19-23
37.29%
24 +
2.54%
Voters: 118. You may not vote on this poll

Mileage Poll

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Old 09-20-2011, 08:00 AM
  #16  
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16.5-17 in town. Best ever on the HWY was 22. Flat ground in Texas and I was doing about 78 MPH.
Old 09-20-2011, 08:45 AM
  #17  
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Right at 20 these days... in spite of all the hi po goodies. Highest I've gotten is when everything else was stock and just got smarty. 22-23 then.

4x4 and auto.
Old 09-20-2011, 09:09 AM
  #18  
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I get on average 16 hand calc'd. That is with everything on kill all of the time. I mostly drive the truck on two lane frontage and in town. If I add in highway or Interstate but keep the speed down then I see 3-4 better. I run the Interstate for about 9 miles into a bigger town sometimes but I usually run 80 so it is in line with the 16. My truck is in my sig for the info.
Old 09-20-2011, 09:12 AM
  #19  
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Disregard one of the 19-23 votes. I just noticed this was for 3rd gen 5.9 trucks not 12V.
Old 09-20-2011, 10:01 AM
  #20  
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Around 17 + city,,, some freeway, hand cal.
4 wd, auto
Old 09-20-2011, 10:04 AM
  #21  
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18mpg on interstate.

20-21 on highway doing 65 with no wind.
Old 09-20-2011, 12:33 PM
  #22  
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18 - 19 mpg back and forth to work, 50 mile round trip, half in town and half on highway at 60 mph. Auto and 4wd
Old 09-20-2011, 02:33 PM
  #23  
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Currently average between 18.5 & 20.5 (hand-calc & running my Smarty Jr on 100% POD). Most driving is highway with lots of traffic congestion and stop-n-go. Before the Smarty, I was getting 20 to 23.5 on the same route. I've had the Smarty for 2-years now and never played around with it or adjusted it down for better fuel economy.
Old 09-21-2011, 10:08 AM
  #24  
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Marked 15-18. Truck in sig.
17-19 mostly Hwy Smarty Jr on 2
Old 09-21-2011, 02:16 PM
  #25  
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15 no matter city/ highway, smarty or not. 15.
Old 09-21-2011, 09:54 PM
  #26  
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Pre Jr towing avg 9-12 every day 80% hwy 20%city avg was 17.4 straite hwy 19.2 with Jr everything went up .5-2.3 depending on driving condition, best gains are during towing.
Old 09-22-2011, 07:14 PM
  #27  
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I average 17 around town. On the interstate if I keep it between 65 and 70, I'm around 21mpg empty... I have the Jr and 6-sp. Hand calculated of course.
Old 09-22-2011, 08:04 PM
  #28  
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I'm 100% stock. O/H lie-o-meter shows 18.3, hand calc. is 13.0 mpg in the city (rural driving). (O/H error of 28.96%) I'm 2wd w/ auto. Hopefully someday I'll get a Smarty Jr.
Old 09-22-2011, 08:49 PM
  #29  
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I average 13, give or take 1 MPG. Usually around 10 when I tow. Best I ever saw was 17.5 and that was me trying to get that. Adding the Smarty helped these numbers a little, but not much. I miss the MPG's of my 2003

On my 2003 I saw as high as 22, but probably averaged 16-18 during the time I owned it.
Old 09-23-2011, 09:03 AM
  #30  
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I am the guy that is getting 24+ all hand cal (lie-oh meter says 28). I use to get about 22.5, then added a stage 2, spool-aid and exhaust manifold and it jump to 24ish on the last 3 tanks. Now let me say I mostly drive country roads at 50-60 and I have a real light foot, in fact when I do go on the interstate, traveling 70, my mileage starts to drop.



Now for some background, my egt’s when traveling on level ground @ 60 are around 525-575 with 2-3 Psi of boost. When cursing up a hill I will 800 degrees and 5psi of boost. My truck is not “lifted” it runs stock tires and the nose is down low like it came from the factory.

FYI, I turn it up to pull my big trailer and I get 12-13 MPG at 70 (20K) and it pulls it like a dream.

Joe


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