What year get the best mileage? - Page 3 - Dodge Cummins Diesel Forum

3rd Gen. Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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post #25 of 40 (permalink) Old 09-19-2010, 02:18 AM
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My '06, 3500 4X4 G56, regular cab only gets 18 - 19. it has slowly climbed to that, buddy has 04 he claims he is nearly getting 30. love the power mine makes and the body styling but not in love with the fuel mileage.

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post #26 of 40 (permalink) Old 09-19-2010, 04:05 PM
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I'm embarased to say my beast won't get any better than 16 mpg empty pulling It gets worse I've been trying different Edge settings so far level 4 Is a good setting but I can't tow In that mode I guess I could try Injectors, also the smarty sr Is an option to be able to set different tunning options as well as other Tunner products but It Is what It Is I still wouldn't trade It for a ricer LOL.
I haven't played with my smarty settings at all. I set it to SW3 and left it. I'm afraid of breaking my stock trans, especially now that I'm towing a lot. One thing I've seemed to notice is that guys with heavy mods and built transmissions seem to be getting the best mileage. Tomorrow will be a huge test since I've gotta pull a long slow winding road with a steep grade. I'm gonna guess I'll get around 9 mpg.
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post #27 of 40 (permalink) Old 09-20-2010, 03:41 PM
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I haven't played with my smarty settings at all. I set it to SW3 and left it. I'm afraid of breaking my stock trans, especially now that I'm towing a lot. One thing I've seemed to notice is that guys with heavy mods and built transmissions seem to be getting the best mileage. Tomorrow will be a huge test since I've gotta pull a long slow winding road with a steep grade. I'm gonna guess I'll get around 9 mpg.
I flashed SW2 for the hell of it this morning before I left and I had noticeably less soot and my EGTs and power didn't change appreciably. I'm hoping it translates to better mpg but I won't find out for a couple weeks when I get a chance to run it with no load for a full tank.
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post #28 of 40 (permalink) Old 09-20-2010, 03:49 PM
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I consitently get 17-21 on the highway/interstate (dependent on traffic, terrain and speed). I got 24 mpg on a 1 1/2 hour trip from Wamego KS to Kansas City on the back roads. averaging 60 MPH. It is really about your driving style.

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post #29 of 40 (permalink) Old 09-20-2010, 07:53 PM
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I stayed on the highway for most of the past 19,000 (same road, same stops, same speed) and have thus averaged 22+ for TOTAL miles in that period. Never less than 24 mpg (highs of 27+) no matter the payload, weather or traffic. 59 mph at 1725-rpm with CC on.

There's no better truck for most work = least fuel than certain model years of the CTD. And that -- economy -- is reinforced by 100K-plus on tires, brakes, etc.

2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 192,000 miles/4,900-hrs @ 39-mph average. 35' 9k GVWR TT. 14.6-cpm solo & 25-cpm towing; 21-mpg average past 41k-miles

Last edited by slowmover; 09-20-2010 at 07:55 PM.
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post #30 of 40 (permalink) Old 09-22-2010, 04:12 AM
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Originally Posted by Diesel_Obssession View Post
My '06, 3500 4X4 G56, regular cab only gets 18 - 19. it has slowly climbed to that, buddy has 04 he claims he is nearly getting 30. love the power mine makes and the body styling but not in love with the fuel mileage.
Same here, I can't really figure it out. My buddy with an 08 mega cab 4x4 is getting better mileage than me. He has a heavier truck, 35" mud tires, and still has the DPF.

My last 4 tanks have been about 90% city driving 10% highway. But my city driving is still like not hitting much lights, and loping along at 80 km/hr where overdrive just kicks in and it's sitting at like 1400 RPM's with cruise control on. 13 MPG average. It sucks, and I cannot figure out what's wrong. It has new injectors, constantly fresh fuel filter, no boost leaks, etc.
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post #31 of 40 (permalink) Old 09-22-2010, 08:56 AM
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Over a 3 mile stretch, completely stopped (stop sign) to the next stop sign and completely stopped, I got 42.3 mpg. Just a "proof of concept" thing to see what the potential was. This was using only the clutch and letting it idle through the gears, top speed was 40 mph and coasted to the stop sign. This was using a SGII that was adjusted to give accurate MPGs. I don't have an overhead.

18-19 mpg though on this 2006 3500 dually on a regular basis. Not really sure what I can get on this if I hypermiled a tank through this. I could probably coax 900+ miles out of the tank. I know 700+ for sure (done it).

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post #32 of 40 (permalink) Old 09-24-2010, 10:24 PM
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48 mph is the optimum speed, any vehicle.

A windless day, downhill (in total altitude), little traffic, . . man, it'd be fun to find out over a dark-to-dark day of driving.

2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 192,000 miles/4,900-hrs @ 39-mph average. 35' 9k GVWR TT. 14.6-cpm solo & 25-cpm towing; 21-mpg average past 41k-miles
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post #33 of 40 (permalink) Old 09-24-2010, 10:32 PM
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hand calculated 20mpg in my 05 during a trip, thats even gettin on it every so often. my avg. around home, goin up and down the mt. for work everyday and rippin around i get 15-16

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post #34 of 40 (permalink) Old 09-25-2010, 02:07 PM
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48 mph is the optimum speed, any vehicle.

lol.... Way too many different factor to say that is the ideal speed for all vehicles. That's like saying "Megan Fox is the perfect woman, for any guy" Well there's guys that like fatties, asians, or black girls so you can't really say that.
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post #35 of 40 (permalink) Old 09-26-2010, 09:13 AM
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My '05 3500 dually 4x4 gets 26.6 mpg @ 70 mph or below. If you take above 70 mph the mpg's drop like a rock! Oh....it's got a 5.9L.

2011 Dodge Ram Quad Cab 3500 ST DRW
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post #36 of 40 (permalink) Old 09-28-2010, 08:45 PM
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lol.... Way too many different factor to say that is the ideal speed for all vehicles. That's like saying "Megan Fox is the perfect woman, for any guy" Well there's guys that like fatties, asians, or black girls so you can't really say that.
It is from the aspect of rolling resistance and aerodynamic resistance. You should read around more. It declines from this point and up, and then really declines past 60 mph (when aero resistance becomes primary).

When you read of folks who try to tell you that their truck does better at 66 mph than at 58 mph, you have:

1] Someone who does not have a stock truck
2] Has altered stock drivetrain parameters enough to screw up the factory balance
3] Never did learn what the truck was capable of when stock by extended testing
4] Has an inferior "high" not itself set by proper testing

.

2004.0 DODGE Ram QC/LB 2500 2WD/NV-5600 305/555 ISB. 7,940-lb. Stock. 192,000 miles/4,900-hrs @ 39-mph average. 35' 9k GVWR TT. 14.6-cpm solo & 25-cpm towing; 21-mpg average past 41k-miles
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