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I know the fuel mileage won't be the same with a lifted truck but my 00 F350 with a V10, 10in lift and 40's got the same if not better fuel mileage than this one. Its got the 5.4, 6in lift, 295.65.20 tires and gets about 8-10 city and at best 12-13 hwy. Combined i see 11.3-11.4 Is this normal for these trucks? I was hoping for something better from a smaller truck. I have changed fuel filter and have ran a few tanks with injector cleaner so far. Plan on the plugs after a few more tanks as I do not know when the previous owners changed them. It has 228xxx miles on it. Seems to idle fine and drive nice.
Hi SSGT, I suspect you might be seeing a fairly "normal" gas mileage, considering the mods on that truck. I had a 2005 King Ranch, with stock tires and rims and no lift, and my best mileage on Interstate highways at 75 mph was between 15.0 and 15.5. Around town, it was 14.0-14.5 depending on how many stops I had to make.
Now, I had custom tunes from PHP on that truck, which improved my gas mileage by about 2 mpg over stock. So, you might look into getting a programmer for yours.
But, your truck looks in beautiful shape for the mileage it has on it. Hope the leather has been cared for as well.
Hi SSGT, I suspect you might be seeing a fairly "normal" gas mileage, considering the mods on that truck. I had a 2005 King Ranch, with stock tires and rims and no lift, and my best mileage on Interstate highways at 75 mph was between 15.0 and 15.5. Around town, it was 14.0-14.5 depending on how many stops I had to make.
Now, I had custom tunes from PHP on that truck, which improved my gas mileage by about 2 mpg over stock. So, you might look into getting a programmer for yours.
But, your truck looks in beautiful shape for the mileage it has on it. Hope the leather has been cared for as well.
- Jack
Thanks for the response. I will be looking at programmers soon as I need to find one that will reprogram for the correct tire size. The speedo is dead nuts at 40mph but at 60 its actually going 65. Im ordering some coil packs and plugs for a nice cooler day to change. The interior was never cared for. Its not the worst Ive seen but its taking some love to get it back in great shape. Just chipped out the sodas and what ever else has been spilled through out the years from the center console.
This is before I started cleaning
Originally Posted by glc
Has the speedo/odo been corrected for the oversized tires?
If it has not had a list of maintenance thrown at it I would begin with that. Otherwise, custom tuning and tire size re-cal is a huge possibility on the bad fuel mileage. Although it is normal to see 12/13mpg once these are lifted up with bigger tires.
The look of the leather makes me want to cry! Whoever got my truck got upholstery that looked almost new. It CAN be maintained, with just a little love.
The 60 vs 65 speed tells me there is a significant error. Since that model year speedo actually reads 2-3% high, you are actually "showing" about 58.5 mph at an actual speed of 65. This just under a 10% error, and you have the same error in your odometer. So, if you are calculating 13 mpg based on mileage and gallons used, you are probably actually getting close to 14.3 mpg. At a "real speed" of 40, your speedo should be reading about 41 mph.
- Jack
Last edited by JackandJanet; Aug 30, 2015 at 05:00 PM.
