Hi Guys:

I am going to go back to gas on next truck, soon. Just can't decide on V10 or 5.4. Currently getting 20 mpg with 6 litre and put on 80,000 HWY kms per year.
I know MPG isn't a big thing on heavy trucks but it is for me on my personal service truck. I will be going with std trans. Also what ratio is best for hwy?

Any help would be appreciated

Thanks

 

I have an '08 CC 5.4L, 4X4, auto, 3.73 LSD with 27K on the odometer. I get about 12.5 MPG. I have never towed, but I have tool boxes and a lift gate, so you can figure I'm hauling another 500-700 lbs. all the time. HTH

 

20 mpg out of a 6.0 OOOOOOOOO---OK!

 

Did you mean km/gal?

 

I am getting high 19 mpg on highway not towing with my 6 litre std trans psd.

 

That's pretty good. It's the same I get with my 7.3L 2WD 6-speed manual.

A lot of people poo-poo mpg with a Superduty using the theory that you shouldn't care if you're a real man in need of a truck. They are idiots. 1 mpg improvement is a larger percent gain with a truck than a small car, and so is the cash left in your pocket. You might actually consider another diesel but swap out for lower freeway gears (3.2x). Or just buy a 5.9L Cummins.

 

Is that US gal or imperial gallons? Not that i doubt it the diesels blow the gassrs out of the water usually in mpg just wanted to clarify.

And by the sounds of it you wont be able to get a manual trans any more after the 09MY is done. Unless your looking for used. Or maybe the 2wd work truck regular cabs or something might still be avail for another year i think i heard. I'm looking for a 6 speed right now but I dont think I can afford to buy new. And the best deal I can find on a used one setup the way I want is a 6.0 diesel and I am real leary with all the problems I heard. And I dont tow daily, will just have a camper trailer, but man getting 18-20mpg would really help as long as diesel doesnt skyrocket to much over gas. I drive 80 mi a day unloaded / all highway pretty much.

 

The mileage is imperial.
I just wish I could replace it with the same thing because the 6.4 aren't getting that.
I can't seem to find out what the gassers are getting on the HWY not towing.
With the mileage I charge in my service contract I hate to buy something harder on fuel - but looks like I will. I love the diesel but hate the $ problems. The money is one thing but any down time is worse.

 

i'm getting between 10.5-11 mpg with my 5.4. but everywhere i drive are back country roads where i'm always on and off the gas

 

Ah! Making better sense now. 1.2 US gallons per Imperial gallon. So you're getting (19 mpg / 1.2) = 15.8 mpg [US] Right where a lot of people would expect a 6.0L PS.

Now I don't feel so bad about the 19 mpg with my 2WD. It kind of made me feel sick not having 4WD with no benefit!

 

Not exactly true. It's the return of improving a less efficient mpg vehicle then improving an already efficient(relatively speaking of course) vehicle.

In other words, if you have both a truck and a car that gets 15mpg(and there are some small cars that get that) and you go to 16mpg your actually getting more "bang for your buck" then if you were to take a vehicle that gets 41mpg and manage to get 42mpg.

So it's really not a truck v. car thing, it's inefficient v. efficient and the difference in the rate of return for that 1mpg improvement. Most people associate inefficient fuel consumption with trucks, but there are cars as well that get the same if not worse(viper, sl 600) then trucks.

 

Thanks everyone for your responses.

I am no closer to knowing what to replace my service truck with.
Where I am charging mileage for my service truck I dread the thoughts of buying new and getting less mileage.
Is it true that if I buy an 2009 F250 tomorrow my best fuel efficient choice for HWY driving would be 1st 6.4, 2nd 5.4 3rd V10?
What is with this anyway? In this "energy efficient" era we live in, how come the p/u trucks are made to get worse mileage every year. If you spend the money for Diesel shouldn't you at least have a fuel mileage advantage over your gas friends who opted not to?

Thanks again
KMP

 

Actually depending on what your situation is it is getting to the point that it is almost a push between all 3 of those.

That's because emissions has taken the forefront over efficiency.


Not really a surprise when you consider most people here drive gas vehicles over diesel.

 

Same meaning.

 

No, not exactly(semantics, but technically true). Let's take a sl 600, which is a small car but gets the same mileage as a SRW diesel 6.0 and compare it to a civic which gets considerably better mileage. Improve the mpg on both by 1 and you'll yield more return with the sl 600 as compared to the same improvement for the civic. That improvement for the sl 600 will give you the same yield on improvement as the 6.0 as their mpg is roughly the same.

Now if you take the civic and compare it to maybe a motorcycle which might get better(I don't know, but for argument's sake let's say it does get better) mpg, the civic will yield more return for that same mpg of improvement as compared to the motorcycle.

My point is it applies it can apply to either a truck or a car(or any fuel consumptive vehicle). The way that you had it phrased as if a truck benefits from a better return on improvement as compared to a small car. It depends on the efficiency of the vehicle, not rather or not it's small or big.