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Old April 1st, 2013, 05:08 PM   #21
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Originally Posted by 73f250cummins View Post
Go Dptuner, i have it and love Dp. Truck has a huge power improvement and 80hp eco tune i was seeing 18 mpg in the city and up wards of 26 on the highway, But i would go with the f5 or switch from Dp alot more use out of it.
April fools?
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Old April 1st, 2013, 07:18 PM   #22
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I am thinking the F5, I have a manual trans so is the F6 really worth double the price? I am not racing it just want a bit more oompf.
The main difference between the F5 and F6 is the ability to download programs (tunes) without removing the chip and sending it in.

From thier website...

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Along with the same capability of the F5 to hold 16 programs the F6 will allow you to never have to remove your chip from your vehicle to download updated programs, download new or trial tunes from your "my tunes" section under your registered website account. A special feature for the F6 Smart chip is Try, then buy. Trial tunes can be downloaded form your my tunes section and used for 10 key cycles.
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Old April 2nd, 2013, 05:55 PM   #23
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April fools?
I got like 21 or 22 or so going 55-60 through ohio heading east from toledo to parkersburg west virginia, which I believe to be all downhill to the ohio river valley....
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Old April 2nd, 2013, 06:27 PM   #24
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I got like 21 or 22 or so going 55-60 through ohio heading east from toledo to parkersburg west virginia, which I believe to be all downhill to the ohio river valley....
I've had my F5 chip over 35k miles. On the "80hp econo" tune the best I ever calculated was 21.7 straight highway at 60
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Old April 8th, 2013, 01:07 AM   #25
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I've had my F5 chip over 35k miles. On the "80hp econo" tune the best I ever calculated was 21.7 straight highway at 60
Stock tires, lift, and gears? The claim of 26 made above was my truck it did get 26 mpg as a best was typically around 23-24 on the highway all hand calculated by filling the tank all the way to the top of the tank and figuring miles travelled by gallons used. The sweet spot was 2000 rpm any higher and fuel economy would drop by 2-3 mpg. I typically got 15.5-16mpg pulling my 5th wheel trailer but once saw a best of 17.5 with the Jody Tipton (DP Tuner) 80 hp economy tune. Ford ruined that though with the CPS (cam position sensor) recall the new one hasn't failed yet but we lost 4 mpg consistently. Maybe he should go back to the DT466 cps I had installed in it.
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Old April 8th, 2013, 07:40 AM   #26
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From my calculations I got between 10-11 MPG on the trip up to R&V pulling the Jeep on the trailer.

$60 in diesel at $4/gallon = 15 gallons
152miles

10.1

Did a little better on the way home as expected.

I can get this if not better than my 03 Sierra 1500 plus the difference in cost of the fuel.

If the DP tuner can get me around 16 it would pay for itself in a year I imagine.

I thought it would do a little better being lower and not a 4x4.

Here is the truck, I imagine the bed to weigh a bit. I had the truck weighed and with a bed from a Canyon in the bed it was 7740 lbs


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Old April 8th, 2013, 08:00 AM   #27
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10 mpg towing is about right. I got 13 mpg at 65 towing a grand cherokee on a big ass gooseneck once, but that was fenton to detroit, flat land....

I've said it before, the big advantage to a diesel is the unloaded mileage over a similar 3/4 ton gas truck. Both get the same towing. Both have the power to tow, unless you are going super heavy then the diesel does get the advantage but for 1-2 "normal" rigs a gasser 3/4 ton (think 6.0 chevy, or v-10 ford type gassers) tows just as well.

When you get into towing consistently over 10,000 lbs the mileage is about the same but the added power makes the experience better with the diesel. (I hate listening to trucks downshift constantly)

Same with comparing a half ton truck to the superduty. The 7.3 will just yank whatever all day, the 5.3 will make a lot of fuss....but the 7.3 won't get much better mileage.

I highly doubt you'll see 16 mpg towing with a tuner on the 7.3, i've rarely seen those kind of claims actually backed up. Even if they are it's typically a best case scenario of a tailwind, a huge downhill, drafting a semi, with an empty 1 place snowmobile trailer.....
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Old April 8th, 2013, 08:06 AM   #28
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I was at 12.5 towing the XJ to and from R&V, avg. about 16-17 in the summer mixed driving. I have owned a few PSD's and never seen better than 18-19 Hwy. No way anyone gets 25+ unlesss it is all downhill.
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Old April 8th, 2013, 08:08 AM   #29
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I have never gotten above 16mpg while towing with mine. However, if I go into mode and drive 55, I can pull 21 to 22.
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Old April 8th, 2013, 08:09 AM   #30
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I was at 12.5 towing the XJ to and from R&V, avg. about 16-17 in the summer mixed driving. I have owned a few PSD's and never seen better than 18-19 Hwy. No way anyone gets 25+ unlesss it is all downhill.
I'm sorry your truck is such a piece of shit, but I am on an 8" spring lift with a 3" body lift, 44" boggers, a lund visor cap out front (of course to increase aerodynamics) and when I tow my 78 ft 5th wheel toy hauler (lifted to clear the bed rails of my lifted truck) with two jeeps on one tons inside I usually get 24 mpg towing.
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Old April 8th, 2013, 08:14 AM   #31
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I think I could have been around 12-12.5 but we left late and I was pushing 80MPH on the way there. On the way back I took it a bit easier to see the different MPG.

I really like the truck and I will be ordering a tuner this week for it.
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Old April 8th, 2013, 08:24 AM   #32
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I'm sorry your truck is such a piece of shit, but I am on an 8" spring lift with a 3" body lift, 44" boggers, a lund visor cap out front (of course to increase aerodynamics) and when I tow my 78 ft 5th wheel toy hauler (lifted to clear the bed rails of my lifted truck) with two jeeps on one tons inside I usually get 24 mpg towing.

I know, one day I will get my shit fixed
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Old April 8th, 2013, 08:34 AM   #33
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you should talk to a mechanic...
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Old April 8th, 2013, 08:38 AM   #34
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I know, one day I will get my shit fixed
Install a tuner, a tornado, and a stack, you'll be amazed at the improvements in your mileage, espescially if you read the overhead
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Old April 8th, 2013, 08:41 AM   #35
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Install a tuner, a tornado, and a stack, you'll be amazed at the improvements in your mileage, espescially if you read the overhead
Can I double stack the tornados? They are cheap enough so why not.

I think for the BEST mpg is to have your exhaust pointed straight back towards the driver behind you and you can smoke screen the hell out of them if you like to burn diesel at an alarming rate.
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Old April 9th, 2013, 02:12 PM   #36
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Towing a 16' enclosed trailer loaded between wixom and Saginaw I have got as low as 10 doing 80+ and as well as 16 at going 65 the whole way. A lot of that had to do with the wind of the enclosed trailer I imagine. A couple months ago I headed down to Alabama towing a two place trailer with a couple of quads and 1000# of birdseed in the bed and pulled 16 going around 75 the whole way. All this was with the "60hp towing" tune. 285 tires, 3.73 gears, 6 speed, no stacks, no tornado
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Old April 9th, 2013, 02:36 PM   #37
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Towing a 16' enclosed trailer loaded between wixom and Saginaw I have got as low as 10 doing 80+ and as well as 16 at going 65 the whole way. A lot of that had to do with the wind of the enclosed trailer I imagine. A couple months ago I headed down to Alabama towing a two place trailer with a couple of quads and 1000# of birdseed in the bed and pulled 16 going around 75 the whole way. All this was with the "60hp towing" tune. 285 tires, 3.73 gears, 6 speed, no stacks, no tornado
Say it isn't so man there's absolutely no way you can get that good of mileage with a 7.3l (sarcasm). I know the numbers you claim and I claim are not typical but I actually got the numbers listed. My 5th wheel was a lite model and only a 25ft'r, it weighed in at 5600# empty. Haven't seen close to those numbers since the recall CPS though. We consistently lost 3-4 mpg with it and from what I've read this is the new norm everyone at the Dieselgarage.com and dieselstop.com were reporting the same losses. My truck is not a stock set-up either and almost all mods done resulted in better fuel economy if you could keep your foot out of it LOL. I always ran my tires at 85psi also. If I went over 2000 rpm which for my truck falls right at 68mph it would drop about 1 mpg for every 100 rpm strange but true. I spent many hours researching and experimenting to achieve the best fuel economy I could.
Maybe we should reinstall the DT466 CPS and try that again, the mechanics wouldn't just give me a new CPS for the recall they said they had to remove and keep what was in the engine at the time of the recall. I told them"no way you're keeping my DT466 CPS" and gave them an old one that had been in the truck previous to me installing the DT466 CPS.
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Old April 9th, 2013, 05:41 PM   #38
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I got the best mileage out of my 03 GMC 1500 today. 21.5 on the way to Belleville and 18.4 average round trip, had a bed full of superduty seats on the way home so I added a couple hundred pounds and a full tank of gas. About 65 MPH roundtrip.

I put Lucas Fuel treatment in it a month or so ago and this is the first I have driven it other than short commutes. It was getting 16-17 empty and 12ish towing a car on the trailer.

It also free'd up the check ball in the fuel pump, used to have to cycle the key to get pressure for it to start right away.

I bought a gallon of it and have been putting it in everything.

I really like the GMC again.

I am going to try and find a factory electric fan to swap in place of the clutch fan setup it came with.
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Old April 23rd, 2013, 06:59 PM   #39
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I've got a 99 250, manual, and am about to order the Dp as well. From the looks of things you just cant go wrong with it...
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