Mpg
Fleet Mechanic
Joined: Jan 2003
Posts: 1,812
Likes: 15
From: Central Ohio
I know how you feel, you'd think with the 'advances' our trucks would be pretty solid in the 20's by now (mpg i mean). Heck there were some chevy trucks in the 90's that were actually EPA rated in the low 20's (I think they were the 6.2 diesle maybe, i'd have to look it up). Its ashame that we cant even match the 90's currently. BUT... the trucks today are about 50% larger, heavier, more powerful, and pretty much all the ratings for payload and towing are way up. On top of that with the diesels they are really craking down on the emissions, I guess you could say its like back in the 70's with the gassers almost. As I recall there were a few model 460 big blocks rated all the way down under like 150 horse power due to the big emisions crunch back in the 70's... we should be thanksfull that at least the trucks today are at their peak capability wise. they just need to get out of the stupid power race and start working on economy a little more.
Postmaster
Joined: Jul 2008
Posts: 2,565
Likes: 2
I don't have real numbers for 3 valve engines, but on 2 valve engines the V-10 gets better mileage not towing and empty than a 5.4L. I know several folks who have both and the V-10's with 2 valves seem to get arount 14 mpg (US) on the highway empty. The 5.4L guys tend to get 12.5 empty on the highway. All have E/C and 4X4 automatics and F250's. I do know a couple of guys with the 6.4L engine and they say they are getting 14.5-15 MPG highway empty.
Junior User
Joined: May 2007
Posts: 77
Likes: 0
Before I lifted my 05 f250 v10 crew cab 8' bed fully loaded=option wise (ref for weight size) I was getting about 13 mpg highway. Now I am getting 8mpg but that's mostly just around town driving haven't done any real highway miles since the lift.
Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
Compare it's calculations to your own, if you add a tuner to your vehicle, you can't trust your computer from then on out for mpg calculations. You have a small chance that the computer and your calculations are going to be close enough(or the same) with a stock truck, change the stock truck configuration, especially fueling tables and it's not going to be correct.
I should be getting 22mpg according to my truck's computer and I actually get anywhere from 13-16mpg.
New User
Joined: May 2009
Posts: 13
Likes: 0
i completely understand that the computer cant be fully trusted never seen one that could i dont bother to check my mileage from fill up to fill up cause i dont really care as far as the whol;e filter deal i think what is trying to be uncovered is wether or not its worth it in the lond run to use the k&n
Thread Starter
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Freshman User
Joined: Oct 2005
Posts: 41
Likes: 0
Thanks again for all the info.
I might be better off going V10 as opposed to the 5.4 for my highway driving.
I might be better off going V10 as opposed to the 5.4 for my highway driving.
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Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
JL
Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
That's a pretty big if and one that I don't think the majority of the tuned population(atleast 51%) would be that lucky to have happen. The reason being is that I'm willing to bet that the majority of the tuned population doesn't have custom tuned vehicles. I see far more off-the-shelf tuner then I do ones for custom tunes. Unless the gas tuning world is all that much different then diesel, I would also be a little shaky as to how much they are actually able to get into that part of the computer. Even with PT DIAG I can only go so far within the computer and that program allows me to tune the ECM, TCM, and FICM of any Ford vehicle.
Originally Posted by QwkTrip
Tex, don't be ****.
"You" wouldn't believe the flaws that you find in people's arguments if you were to start picking them apart and those flaws might actually be big enough to keep you from swaying over to that decision and what doing that entails.
Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
That's a pretty big if and one that I don't think the majority of the tuned population(atleast 51%) would be that lucky to have happen. The reason being is that I'm willing to bet that the majority of the tuned population doesn't have custom tuned vehicles. I see far more off-the-shelf tuner then I do ones for custom tunes. Unless the gas tuning world is all that much different then diesel, I would also be a little shaky as to how much they are actually able to get into that part of the computer. Even with PT DIAG I can only go so far within the computer and that program allows me to tune the ECM, TCM, and FICM of any Ford vehicle.
JL