Mine was built in March and I just got it last week. Did a 500 mile trip over the weekend and got 19.2 MPG. That includes a bit of city driving, a few miles offroad in 4X4, but mostly 65-70 MPH on the highway. If it had been all highway I would have gotten close to 20 MPG. That is hand calculated, my overhead shows about the same. I traded my Ford V-10 for it and I'm thrilled with the performance and mileage. BTW I used the Power Service/MMO mix which I'm told helps the mileage. 15K miles on it.

 

March 2004, right??

 

Yes, I bought it used. From what I've read the reflash helps a lot if you're getting low mileage. I don't know if mine got the reflash, but I'm leaving it alone cause it runs great.

 

Hah! No tall tails or fudge here buddy. My numbers are what they are. Hand calculated and correct. Take them for what they are and how you want too. But they are right.

 

I gotcha all beat. Even the good friend of a friend of a friend. 99 MPG here. Reset overhead rolling downhill on interstate 70 MPH in neutral. It is what it is. Gotta be. The overhead doesn't lie!


Now all joking aside. Try not resetting the overhead for say two or three thousand miles and then see how many are getting 20-22 MPG. Long term I get 17-18 tops.

 

Guys/Gals, when we talk about MPG we should talk in about the rear end ratio at the same time.

With a 4.10 and milage flash I get.

City ~ 17.5 MPG
Hyw ~ 19-20 MPG at 62 MPH
Tow ~ 10-11 MPG mountains at 50-60 MPH - 14,000 LBS 5er
Tow ~ 11-12 MPG low hills and flats at 60-70 MPH 14,000 LBS 5er

When I put in fuel additive I gain about one MPG. When towing or high speed non towing the increased MPG is not noticable.

Regards

 

Frank...may want to add that your truck is a 2wd. They really get good mileage!

 

For giggles, I checked my flat, sea level, steady state speed milage by resetting the overhead while doing each speed. I managed 28.7 MPG @ a constant 47 MPH.

 

I now have 6,600 miles and best tank is 19.6 MPG and the worst is 15.7 MPG. Typically it ranges from 17.5-18.0 MPG. This includes highway driving at 70 MPH.
2500 4x4 auto long bed. Everything stock except the tires, upsized to 275.

 

FRANKB are you talking US gallon or Imperial gallon?

 

I wish I got that good. Mine is an 05 but it is early I think Jan. build date. I get 16.5 17 at 65 on summer fuel. 14-15 on winter fuel. I would guess that some of it is hills and some of it is elevation. I have an alum cab high topper on it most of the time probably lighter than the 400 lbs stated. I sure wish that I could get the 20 mpg. It is ironical that I traded an SO 2003 for this one. I do trust the 48RE more than the 47RE, and like the 600 when I hook some thing up to the towbar, but cuss it every time I fill it. My buddys dura crap is cheaper to drive. I tell him it will all even out as soon as he gets into the purchase of the front end parts he will need at about 40,000 miles.

Hilly in Montana or is it Hill Billy?

GS