Go to this thread, read completely…. Follow, on page 3..MLF250’s format, it is good…and easy! and post. Important update to instructions on page 6.
Most important part of this data...also, there “is” owners out there that have had no problems. To be fare to my methodology… I need the same from the “no problem” owners.. i.e. mileage (mileage is the odometer reading)
important a “no problem” statement if you have had none.

ODOMETER reading at time of problem is critical.
In addition, please read more instructions, bottom of first page, posted by Tim L
The simpler the writing (posting) of “problem/odometer” reading………….the easier it will be to collate.
Do not need many words, NO stories.
I must reduce all the date into a usable format; extra words will take more time to complete.

https://www.ford-trucks.com/forums/s...hreadid=185570

I implore all 6.0 owners to please take the time

Thanks
Tim

 

I just returned from a 2,277.7 mile round trip from the Houston area to Crested Butte Colorado and I got 18.32 miles per gallon. I was haulling just under 1000lbs of cargo and 4 220+lbs adults. Cruising about 80-85 mph, except going over the passes in the mountains which is full of 6% grades.

 

The thread above yours............have you gone and filled out your data???

 

Hi Tim,

Just filled in my data. I HAVE had my share of problems with this truck, but everything seems to be working perfectly since re-flash in mid-January.

 

Great and thanks

 

just filled it out hope it is the way your looking for it.

 

I got 14 MPG out of my first tank of fuel that was pretty much a 50/50 mix of highway and city driving.

Bill

 

That is OK for new

 

15.4 when truck was newer (100 miles on speedo)

14.4 on first fill up.......................

13.3 on last fill up (800 miles) ....

Estimating 13.2 now............

I have installed 35" tires w/o speedo recalibration .......

 

2003 F-250 superduty 6.0 Lariat crewcab 4x4 sport

I guess my overhead fuel calculator must be messed or I just got lucky. Never manually checked it myself.....never felt the need with this Ford quality.
18-18.5 city/ 20-21.5 hiwy 8000 miles on truck and never had any problems YET.......no updated flashes, excellent running truck!
15.5 mpg pulling 32' camper 9000#

 

Fuel Log for mine. No reflashes, May 31, 2003 build date.

 

Great log would you be willing to email me the same would like to use your software to build mine.
Or how ever you ahve done it.

 

The overhead onboard mileage calucator is not all that accurate. Do it manually over a few times to find out what it really is.

 

Tim,

I't an Excel spreadsheet. How's your Excel working ability?

 

If you have it handy can you post it here? I'm sure others will be able to use it also (myself included!)

J. Simonian