MPG on 2005 with 500 miles??
02-08-2005, 01:35 PM
#16
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We got ~14.5mpg for the first 2500 miles or so (80%city 20%highway)
The following 1000 miles and TSB 037 we've been getting ~15mpg with similiar driving.
~Nate
The following 1000 miles and TSB 037 we've been getting ~15mpg with similiar driving.
~Nate
02-08-2005, 06:31 PM
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Well, I just put the first tank in since passing 10K miles and that tank of mixed driving gave me 16.4MPG, consistent with my overall average. I still get about 18.5 average on 100% highway, with a best of 20.0MPG on a 300 mile trip of mostly flat ground. Overall I'm still very pleased! I just can't wait until I get some EDM's and hopefully bump it up another 1-2MPG.
02-08-2005, 07:46 PM
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Originally posted by Deer716
I have 4500 miles on mine and the best i've got is 13.8mpg. I hope it gets better.
I have 4500 miles on mine and the best i've got is 13.8mpg. I hope it gets better.
I just turned 600 miles on mine and my overhead indicates (no load) 17.4 mostly city driving and 20.5 at 65 on the highway. I'm not sure how accurate my overhead is because I haven't hand calculated it yet. As soon as I get h/c figures, I'll post them.
02-12-2005, 12:27 PM
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Driving habits factor quite a bit into this equasion.....when I try real hard, the best I get unloaded going down the freeway at 70 MPH is 17.4 MPH.
7000 miles on a 2004.5 CTD, DRW, 4X4 QC. Love it!
7000 miles on a 2004.5 CTD, DRW, 4X4 QC. Love it!
02-12-2005, 12:44 PM
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Mileage is all about how you drive it...
YES, you will get 15-17 mpg if you drive an 8,000 pound truck like everybody around you in traffic in 3,000 pound sedan!
YES, you will get 19-21 mpg (my observed average from new to 19,000 miles on the clock) if you try to keep maintain a more steady speed, and dont launch off every stop light like your in a sports car.
YES, with a few modifications ANY of these trucks will run in traffic just like the mustang in the next lane (sorry to burst the bubble, but what I'm saying here is all the same if you have a 1984 king cab dually, or a 2006 short bed 2500!!!).
No matter proud you are of your particular truck, the quicker you try to move 4 tons of weight the more fuel you'll use doing it.
NO, the mileage you are getting with 3 miles on the clock is NOT going to get beter with 20,000 there. MANY things effect mileage. The suposed "break in period" is not one, people who think this is the case are simply repeating old wives tales that WERE true when applied to an engine in a '57 chevy. With the technology applied to any automotive engine since the early 70's the break in period will NEVER give a net effect of more than aprox. .5 MPG. (be happy to point you to the engineering team of your choice if anyone would like to argue)
EASE OFF THE PEDAL A LITTLE and you'll really be shocked how fast the mileage starts to climb!
YES, you will get 15-17 mpg if you drive an 8,000 pound truck like everybody around you in traffic in 3,000 pound sedan!
YES, you will get 19-21 mpg (my observed average from new to 19,000 miles on the clock) if you try to keep maintain a more steady speed, and dont launch off every stop light like your in a sports car.
YES, with a few modifications ANY of these trucks will run in traffic just like the mustang in the next lane (sorry to burst the bubble, but what I'm saying here is all the same if you have a 1984 king cab dually, or a 2006 short bed 2500!!!).
No matter proud you are of your particular truck, the quicker you try to move 4 tons of weight the more fuel you'll use doing it.
NO, the mileage you are getting with 3 miles on the clock is NOT going to get beter with 20,000 there. MANY things effect mileage. The suposed "break in period" is not one, people who think this is the case are simply repeating old wives tales that WERE true when applied to an engine in a '57 chevy. With the technology applied to any automotive engine since the early 70's the break in period will NEVER give a net effect of more than aprox. .5 MPG. (be happy to point you to the engineering team of your choice if anyone would like to argue)
EASE OFF THE PEDAL A LITTLE and you'll really be shocked how fast the mileage starts to climb!
02-12-2005, 06:56 PM
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OK I will now chime in on this. I just filled up from my first tank on my 05. 14.0 mpg= 13.7 hand calculated.
Most of the time, I drive it light on the go pedal & light on the brakes. I try to shift the 6 speed, at idle to 2100 rpm shift 1500 rpm to 2100 shift, ect. I know the miles are new, and I have winter blend, but I went from 17.9 avg. to 13.7? ouch.
PS I used power service on my 98, is it too soon to use fuel additive on my 05?
Thanks,
James
Most of the time, I drive it light on the go pedal & light on the brakes. I try to shift the 6 speed, at idle to 2100 rpm shift 1500 rpm to 2100 shift, ect. I know the miles are new, and I have winter blend, but I went from 17.9 avg. to 13.7? ouch.PS I used power service on my 98, is it too soon to use fuel additive on my 05?
Thanks,
James
02-13-2005, 10:56 AM
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unless you are under load all the time why are you shifting at 2100rpm? I shift at 1400 and have more than enough power to do so. evrybody says they drive with a light foot but they get horrible mpg, thats bull. the engines leave the factory within 5% of each other power wise the person controling them determines how much they drink.
02-13-2005, 01:59 PM
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The information that I've seen from Cummins when they were developing the 24V, common rail engine is that they set it up to be shifted at 1,800-2,000 (my personal experience has shown me shifting at 2,100 WILL drop the mileage by about 1-2mpg!). There fuel system, timing, well, for that matter the whole engine itsself was all developed around the 6 speed manual tranny, and a 4.10 rear end (big influence on my purchase).
The 3.73 rear end will at VERY best add 1mpg with a wind behind it. And I've seen this proven out on long trips with a friends truck. The trade off is that its always been much slower up hills than my truck.
13.7mpg STINKS! I'd be plenty upset with that too if your talking about an empty truck! (even loaded I've never seen that low of a number!)
I have consistently seen my mileage drop from 19.7 empty to 16.8 pulling only a 3,000 pound trailer. (numbers verified at the pump)
I've also learned that with every modification the trip computer is further and further off from the mileage numbers I get when adding things up at the pump, ESPECIALLY when I went straight pipe! (still the best mod. there is IMO!)
The 3.73 rear end will at VERY best add 1mpg with a wind behind it. And I've seen this proven out on long trips with a friends truck. The trade off is that its always been much slower up hills than my truck.
13.7mpg STINKS! I'd be plenty upset with that too if your talking about an empty truck! (even loaded I've never seen that low of a number!)
I have consistently seen my mileage drop from 19.7 empty to 16.8 pulling only a 3,000 pound trailer. (numbers verified at the pump)
I've also learned that with every modification the trip computer is further and further off from the mileage numbers I get when adding things up at the pump, ESPECIALLY when I went straight pipe! (still the best mod. there is IMO!)
02-13-2005, 08:39 PM
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I am new to this 6 speed thing, I had to wind up the ole 5 speed a little bit to keep her moving. I thought 1800-2100 was the CTD rpm "sweet spot" and I alway heard you can damage a cummins by lugging, not over reving. Maybe I need to learn from some of the seasoned 17 and higher mpg guys how to shift again. I will try to relearn to up shift at 1800 rpm and see what that does. I noticed my mileage is dropping still down to 13.7 or worse yesterday and today. What about a leaky injector? Or am I just paranoid?
Thanks all
James
Thanks all
James
