I know my HD 8' SCAB weighs in a touch over 6200 lbs because when I go to the dump in town you drive over a scale.

 

Ok, explain this one.
I bought my truck from the dealer with 265 miles on it. The first tank of gas I got about 19.6 mostly highway, some light city driving.
So I have filled up with the same gas, from DIFFERENT gas stations. Not all the same, and not all different.
My gas milage has progressivly gotten worse. I have now 5,600 miles and I just checked my milage today and it is 14.76.
I know they have switched to winter blend, but that should have affected it earlier on. Each tank of gas shows about a 1/2 mile per gallon less than the previous.

 

ctford guy


Your truck weighs 6,200 lbs. and my std. cab short bed 4X4 weighs 5,110. No wonder we have a great variation in fuel mileage. I'm very pleased with my mileage as it slightly exceeds the ratings on the sticker but I think all trucks with the same engine had the same rating even though there is a great variation in weights and gears.

 

Mkoser - are you referencing the computer? If so that is the average for all the driving time between resets! When back out on the HWY do a reset, bet it will be back to 19 or so.MY SCREW Lariat 5.4, 3:73LS is 19.8 at 65 mph steady no wind flat terrain on the HWY.

 

Sorry I should have mentioned this.
No, I don't have the fuel computer, I just do it manually.
MK

 

Howdy,

I bought a F-150, 5.4L FX-4 Super cab with a 5.5' bed this summer. I check the mileage for each gas tank by calcualtions and try to drive conservatively.

I got better gas mileage before the first oil change at 1,000 miles (15 to 17 mpg). After the oil change it immediately dropped about 2 mpg.

I was told by the dealer that the trucks come from the factory with thinner oil because the engines are tight. Could that be true??

 

Doubt it, can't get much thinner than 5W-20. Think he is telling you a story. Don't think the owners manual would let you go 5K miles till the first change if the oil was thinner than 5W-20.

 

I think they stopped using break-in oil long ago. a 2 mpg drop in mileage is significant, but I'd wait till you get a few more miles on the truck before you make any determinations.

 

I have noticed that same thing with my Scab 5.4 Flare. I also changed my oil at 1000 miles. The oil I used was not Motorcraft, it was a non-synthetic brand name 5W-20. Since then, I learned that the Motorcraft was a synthetic blend. In a few hundred miles, I'll have 3000 and will change back to Motorcraft. I doubt that this has anything to do with mileage but I started out getting 17 and have consistently dropped to 13 mixed. I am just waiting for someone to find the "secret" combination that will let us all achieve 18 MPG……...

 

04 black screw larait 4x4, 5.4 ,373ls. 1 was getting 21 mpg on hywy and 16 an town, then they changed the clutch and pinion gears in the rearend, and my milage just keeps worse. i have 12,000 and i'm getting 12mpg in town and 17 on hywy, still not bad but i think there is still something wrong in the rearend. it feels like it is slipping, maybe to loose now. they said it was to tight before thats why they changed it.but it runs good and i do not have the vibration problems yet and hope not to get them.

 

Something seems wrong. I don't have a new 150, but I had a 2001 with the 5.4 and averaged around 16.5 with a high of 21. Never got less than 14.5 average per tank. Calculated long term averages.

The thing that I would be most annoyed at is Ford's advertising. The claim when the new 5.4 was announced was that it was more efficient.

I average 12.5 with my 2001 F250 V10 4x4 auto Crew Cab....

Good Luck

Eric

 

I have an 04 F150 ext cab Lariat. Got the tow package as I tow at least 1-2 times a week pulling a horse trailer.

When I first got the truck and beofre my first oil change, I got a between 18-19 mpg and was estatic. Since then, (currently have 11,600 miles on it) I get 14-14.5, sometimes 15 mpg and don't know why it went down???? Plus, I haven't really noticed that big of a difference when I tow. Maybe I should figure it out manulally versus relying on the computer???? I do know it seems like every other day, I need to get fuel.

I have also noticed that if I don't fill the gas tank up, it burns it faster...why?

I use 89 unleaded fuel and anything but Shell. I hvae not noticed any improvement when I use a more expensive brand

 

The computer is not a good indicator of actual mpg. You need to just do the math out at the pump.

 

Now that winter time is upon us (soon anyway). My mileage dropped from 18 to 16.5. Last tank was actually 15.7, but that tankfull had some 4 wheelin' on it. Gotta love huntin' season.

 

hey guys,
dont know if anyone really cares, but i will give my .02. before getting my 04 xlt scab 5.4, i had a 03 explorer with the v6, which my wife currently drives. comparing window stickers the 300hp truck shows a drop in mpg on both city and highway of 1mpg. 15 and 18 in exp and 14 and 17 in truck. both of those vehicles were close in actual mileage to what the sticker said. and comparing ride, the truck feels like a caddy, and the explorer feels like a truck.

bottom line, better ride and more power, i'll give up a few extra $'s a week for the mileage!!!!