MPG ?
Cargo Master
Joined: Apr 2018
Posts: 2,412
Likes: 1,124
Expecting 20 MPG.....
Hotshot
Joined: Jun 2003
Posts: 12,353
Likes: 4,388
From: SW VA
You are so triggered by this topic that it’s sad. Your passive aggressive replies littering this thread is comical though…
Laughing Gas
Joined: Dec 2021
Posts: 1,098
Likes: 343
From: PG, BC, Canada
You see those buttons on the column shifter?
Crazy story: one time I saw a steep grade about 1/2 mile out, so I figured, why not, so I pressed the '-" button, and get this, you are not going to believe this, the tranny downshifted to 9th.
I know, I know, pressing a button without AI assistance with GPS mapping out the hills to downshift in advance. Some of us are truly living in stone ages.
Next week I will tell you about how some of us drive just fine with manually adjusted seats. I might as well be driving model Ts with my old ways. LOL
Crazy story: one time I saw a steep grade about 1/2 mile out, so I figured, why not, so I pressed the '-" button, and get this, you are not going to believe this, the tranny downshifted to 9th.
I know, I know, pressing a button without AI assistance with GPS mapping out the hills to downshift in advance. Some of us are truly living in stone ages.
Next week I will tell you about how some of us drive just fine with manually adjusted seats. I might as well be driving model Ts with my old ways. LOL
BUT.It's an Automatic transmission...
That isn't programed properly and thus, you need/must do it manually... a fail if I ever saw one... 
IMO. It's not that it can't be done properly and no manual (intervention) is needed, it's because it doesn't/isn't, (programed) to gear down soon enough that the problem arises . 
The ECU "knows" the truck is slowing down, but it doesn't gear down, thus loosing more speed, then it gears down 2 gears, but alas too late, over and over it happens, (used to happen) with my truck and then it now it needs to loose 2 more gears and now is also trying to "make up" the speed it lost... 
I have actually overcome this problem with my 5 STAR tune...
Logistics Pro
Joined: May 2021
Posts: 4,024
Likes: 2,339
Good for you... BUT.
It's an Automatic transmission... That isn't programed properly and thus, you need/must do it manually... a fail if I ever saw one... IMO. It's not that it can't be done properly and no manual (intervention) is needed, it's because it doesn't/isn't, (programed) to gear down soon enough that the problem arises . The ECU "knows" the truck is slowing down, but it doesn't gear down, thus loosing more speed, then it gears down 2 gears, but alas too late, over and over it happens, (used to happen) with my truck and then it now it needs to loose 2 more gears and now is also trying to "make up" the speed it lost...
I have actually overcome this problem with my 5 STAR tune...
BUT.It's an Automatic transmission...
That isn't programed properly and thus, you need/must do it manually... a fail if I ever saw one... IMO. It's not that it can't be done properly and no manual (intervention) is needed, it's because it doesn't/isn't, (programed) to gear down soon enough that the problem arises . The ECU "knows" the truck is slowing down, but it doesn't gear down, thus loosing more speed, then it gears down 2 gears, but alas too late, over and over it happens, (used to happen) with my truck and then it now it needs to loose 2 more gears and now is also trying to "make up" the speed it lost... I have actually overcome this problem with my 5 STAR tune...
Makes one wonder how millions of gas truck owners with 3.73 across all three brands have been surviving all these years.
With all the money you spent on your tunes and what not, should have saved a bit more and just gotten a diesel instead.
Logistics Pro
Joined: May 2021
Posts: 4,024
Likes: 2,339
Hotshot
Joined: Jun 2003
Posts: 12,353
Likes: 4,388
From: SW VA
Anyone reading your replies vs mine in this thread have a pretty good picture of who has the problem.
Laughing Gas
Joined: Aug 2016
Posts: 1,182
Likes: 176
When he posts I just Belu him off and ignore them
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Laughing Gas
Joined: Dec 2021
Posts: 1,098
Likes: 343
From: PG, BC, Canada
Or you can think ahead a few car lengths. I know it can be tough for some, paying attention to the giant hills one approaches, you may even need to use your eyes to look down the road, truly laborious.
Makes one wonder how millions of gas truck owners with 3.73 across all three brands have been surviving all these years.
With all the money you spent on your tunes and what not, should have saved a bit more and just gotten a diesel instead.
Makes one wonder how millions of gas truck owners with 3.73 across all three brands have been surviving all these years.
With all the money you spent on your tunes and what not, should have saved a bit more and just gotten a diesel instead.
11.8 MPG loaded, 14.9 MPG empty, 20.7 MPG best. 6.5 diesel
11.3 MPG loaded, 15.8 MPG empty, 20.1 MPG best. 6.2 gas took around $1,200 to get it there, started at, 8.9, 13.0, 14.5 MPG stock...
Cargo Master
Joined: Mar 2021
Posts: 2,044
Likes: 1,336
More Turbo
Joined: Feb 2011
Posts: 717
Likes: 188
Which Amsoil gas treatment do you use?
Laughing Gas
Joined: Dec 2021
Posts: 1,098
Likes: 343
From: PG, BC, Canada
5th Wheeling
Joined: Jan 2023
Posts: 41
Likes: 7
Car and Driver just published a real world roundup test of heavy duty pickup trucks to compare gas vs diesel. On their constant speed highway test the gas units averaged 15, so there is no way they will get 15 around town. The diesels averaged 18, and the ford got 20. I do not know what rear end you have but that will also affect your numbers.
Lead Driver
Joined: Jan 2002
Posts: 8,676
Likes: 4,780
From: Itinerant
From my thread in the 7.3 section it has a couple years of totals when the truck had 129k miles on it. On the hwy at 55-65 mph mileage can be great at mid 16's to 17 mpg. 65-75 mph 15-16 mileage. 75-85 upper 13's to 14's mileage depending on wind conditions. If windy conditions expect an extra fuel stop. This has been my experience with my '21' 7.3 3.73 after 146,000 miles. 
https://www.ford-trucks.com/forums/1...l#post21079358
https://www.ford-trucks.com/forums/1...l#post21079358
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Newblue150
1997 - 2003 F150
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Jul 11, 2003 02:25 PM