rlj676

Are you able to get X-plan price? That might be able to help you save on superduties where they aren't negotiating too much because they're new.

Audiofn

Think of it as it gets 8 times better gas milage then your boat

VetteLT193

The 450 with the 4.88 ratio is a major pulling machine.

If you swap the ratio for 4.30, and bump the tire size up, you'll be close to the MPG that the 350 gets.

I hate to tell you this, but if you were hauling fine with the 350, you bought the wrong truck this time. If you were struggling a bit before, then you just got the wrong gears.

BigSilverCat

I have no reason to lie about this, I was not going off what the trip computer said, I went off the amount of miles I drove and how many gallons of diesel I used, this was not a 50 mile trip it was over 2000 miles. and we had a further check to the milage was that the other truck was getting around 8 miles to the gallon and I would only stop every other time he did and I would have more left then he would when we stopped. and too add to this the boat was hooked to the truck when I got there to pick it up when we arrived in destin we were taking the trailer off the truck and realized we hauled it down there on a 2" ball.

Sean H

i think your numbers are off, we were getting 9 not 8!

and yes, the 17 is hard to believe unless you were at the fuel pumps with us.

44MTI

Funny how people have all the answers without getting the info first. Yes, I pulled fine with the 350, however, my insurance put a disclaimer which makes it null and void if over the rated capacity of tow vehicle. Which I was, hence the 450. I would have rather had the 4:30 gears, but I needed one in March and there were none to be found, so I got the 4:88's. One of my friends has the the same truck with 4:30's and pulling to chicago we got almost the exact same mileage, both pulling 44 MTI's.

plumbers crack

I just test drove a 2008,and I decided the smell of new couldnt replace the reliability of old!2002 7.3

Jamie B.

Guess it depends on the manufacturer. With a Cummins, to help it seat under the same load conditions that it will encounter all its life, its recommended / its ok to pull heavy right from new. Its also recommended to not use synthetic oil until about 30,000 miles.

Michael1

I don't see how changing a chip or reprogramming the computer is going to "improve" mileage. More likely it is the other changes people do at the same time. All the reprogramming I've seen just allows the engine to be overfueled, and sometimes overboosted, for more power. You're not likely to be at the wastegate pressure just going down the freeway.

Michael

Jakkle5

They can write tunes for whatever you want. I use Innovative Diesel and have a race tune, street tune, and a MPG tune which actually boosted the MPG 2.2mpg when used. So yes, they can make you one.