Comprehensive MPG thread.

[Loshad]

"I’m planning to get a DiamondBack HD cover for the bed. Maybe that’ll help a little with fuel economy?"

Having studied aerodynamics I've got some good news and
some bad news. The good news is it probably will. The bad
news is it won't be measurable. The only measurable factor
is your right foot.

 

[Rooster]

Following closely..Gas at $ 1.87 /gal today in South Texas . I am in the shadows of all of the major refiners and fuel is cheap now.

just found this thread today and thought the posts were recent saw this one and before I realized it was 2 years old I had two bags packed ready to move to Texas

 

[captaineegee]

2022 F250 7.3L 4x4 Fx4 Lariat | 3.55 rear end | tire pressure set the door jamb specs | stock all around except for a peragon bed cover.
Best tank was 17.23mpg doing between 75-80 on i10 with cruise control set in eco (mesa-palm springs.
Worst tank was 10.2mpg pulling a 16' trailer with a 4seat turbo rzr from Mesa to ShowLow in tow/haul
Avg lifetime mpg is 14.26 and this is hand calcd at every fillup to my xls - overall mileage is 11,867.

 

[JTredway]

Here's mine:

1. Engine: 6.7
2. F250 or F350: 250
3. What Blend: Both
4. Mileage: 20k
5. Stock Oil: Yes, SynBlend
6. Hand Calculated MPG or Truck Computer MPG: Fuelly, AFE has been recalibrated also.
7. MPG Combo Unloaded: (see above)
8. MPG/MPH Highway Unloaded: N/A
9. MPG Towing: N/A
10. MPG Hauling: N/A
11. Octane or Diesel: Diesel w/ Optilube XPD
12. Tire PSI Unloaded: Stock
13. Tire PSI Loaded: Stock
14. Stock truck or Tuned: Stock
    1. Programmer (If Tuned):
15. Engine/Exhaust/Intake Mods: S&B Intake
16. Diesel Deleted: No
17. Stock Tires: No, 35x12.50R20 Toyo MTs
18. Stock Wheels: No, Fuel Beasts 20x9
19. Lifted: No
20. Reverse Leveled: No
21. Elevation from Sea Level: Atlanta, Georgia Area
22. Average air temp: Hot Humid in the summer, cool and bearable in the winter
23. Tonneau Cover?: Yes, Bakflip MX4.

 

[jjfred2112]

Engine: 7.3L

F250 or F350: F250

What Blend: Summer (live in central Texas)

Mileage: 21,778

Stock Oil: Castrol Edge Full Synthetic

Hand Calculated MPG or Truck Computer MPG: Hand calculated MPG

MPG City Unloaded: 12.7

MPG/MPH Highway Unloaded: 15.9

MPG Towing: 12.1

MPG Hauling: n/a

Octane: 87

Tire PSI Unloaded: Front - 60 ; Back - 80

Tire Psi Loaded: same as above

Stock truck:

Programmer: n/a

Engine/Exhaust/Intake Mods: 4" MRBP Catback exhaust

Diesel Deleted: n/a

Stock Tires: Stock

Stock Wheels: Stock

Lifted: Stock lift

Reverse Leveled: n/a

Elevation from Sea Level: 158 meters

Average air temp: Summertime - 100s

Tonneau Cover: RSi SmartCap

 

[Sendit6.5]

"I’m planning to get a DiamondBack HD cover for the bed. Maybe that’ll help a little with fuel economy?"

Having studied aerodynamics I've got some good news and
some bad news. The good news is it probably will. The bad
news is it won't be measurable. The only measurable factor
is your right foot.

Sorry for the late reply! I’m pretty sure you’ll see a MPG increase with the cover. I can’t say for sure because I added a UpTop Overland Alpha rack to my roof along with a 40” Baja Designs light bar that is sitting ‘prouder’ than I want. I installed it at the same time as my DB cover. Still, I’m getting 17.5mpg average. Just took a 2,225 mile road trip from south Texas to Denver and back through the mountains. So, I’m pretty happy. I think that, once I change the light bar to something that will fit behind the custom cut front faring available from UpTop Overland, I’ll get a bit better mileage.

I’m curious what you’ve been getting with just the DB cover?

 

[soulezoo]

I have the DB cover and noticed no gain at all. I have checked it a couple of times with cover on/off. It sure makes going through the car wash easier!

 

[_Slayer]

Engine: 7.3L

F250 or F350: F250

What Blend: Summer

Mileage: 3650

Stock Oil: Penzoil Full Synthetic

Hand Calculated MPG or Truck Computer MPG: Hand calculated MPG

MPG City Unloaded: 12.7

MPG/MPH Highway Unloaded: 14.2

MPG Towing: 8.6

MPG Hauling: n/a

Octane: 87
Tire PSI Unloaded: Front - 70 ; Back - 75

Tire Psi Loaded: same as above

Stock truck: Yes

Programmer: n/a

Engine/Exhaust/Intake Mods: n/a

Diesel Deleted: n/a

Stock Tires: Stock

Stock Wheels: Stock

Lifted: n/a

Reverse Leveled: n/a

Elevation from Sea Level: 925'

Average air temp: 80

Tonneau Cover: n/a

 

[Loshad]

There's no way a tonneau is gunna measurably affect mpg below 60-70 mph. That's why small planes don't take off until 70 and they're sporting 30' wings! The only way a tonneau would possibly help is if it was connected to the back edge of the cab. Even at 70 mph any possible benefit is likely negated by the abrupt air flow change at the tailgate. Put a 10' long cone on the back of your tailgate and then you'll see some measurable results!

 

[SKIPGOOD]

Engine

7.3

 

[SKIPGOOD]

There are always so many variables to mpg, so I will try to add them all in. If you have some I didn't think of let me know and I will add them. Maybe a moderator can make this a sticky?

Before I hear the "it's an HD truck, expect crappy mileage" comments, I get that and expect it and not complaining about it, I still would like to know though!
I'm not sure about Diesel fuel but for the gasser guys, we are still in the winter blend for fuel and when the summer blend gets here we will be getting probably 2% MPG better! For those that don't know the difference here's a link (Winter/Summer gas Diff). My truck is on order so I can't play yet, but I will!

To try and keep this as a legit apples to apples comparison, I would like to do the following criteria. I know it's a lot, but more data points will cut down the variables. Try to answer as many as you can. If you have to leave some blank that's okay too. I made an empty template at the bottom you can copy and paste into your reply to make it easier for you.

Summer Blend May 1st through September 15th
Winter Blend September 16th through April 30th

Engine: 6.7 or 7.3

F250 or F350:

What Blend: Summer or Winter

Mileage:

Stock Oil: Yes or No (if no Brand and weight)

Hand Calculated MPG or Truck Computer MPG:

MPG City Unloaded:

MPG/MPH Highway Unloaded: MPG plus your average highway speed

MPG Towing: MPG plus tell us Trailer weight with load/ height/ axles/ Closed or enclosed/ type/ 5th/ goose/ bumper

MPG Hauling: Weight in bed

Octane: 85/86/89/91/92

Tire PSI Unloaded: Front/ Rear

Tire Psi Loaded: Front/Rear

Stock truck: Yes or No

Programmer: Yes or No (if yes, what brand and setting)

Engine/Exhaust/Intake Mods: (if yes what did you do)

Diesel Deleted: Yes or No (If yes brand/ setting/ HP gain)

Stock Tires: Yes or No (if no what size, brand, and weight if known)

Stock Wheels: Yes or No (if no what size, brand, and weight if known

Lifted: Yes or No (if yes lift height and brand)

Reverse Leveled: Yes or No (if yes how much lower in rear)

Elevation from Sea Level: (3% percent power loss per 1000 feet above sea level)

Average air temp: (Cold air is much more dense)

Tonneau Cover: Yes or Know


Empty template below to copy and paste into your reply.


Engine:

F250 or F350:

What Blend:

Mileage:

Stock Oil:

Hand Calculated MPG or Truck Computer MPG:

MPG City Unloaded:

MPG/MPH Highway Unloaded:

MPG Towing:

MPG Hauling:

Octane:

Tire PSI Unloaded:

Tire Psi Loaded:

Stock truck:

Programmer:

Engine/Exhaust/Intake Mods:

Diesel Deleted:

Stock Tires:

Stock Wheels:

Lifted:

Reverse Leveled:

Elevation from Sea Level:

Average air temp:

Tonneau Cover:

I tried to copy & past my answers, but I need to know where to paste the answer...
I tried to the right of the gasoline... 7.3L but it only gave option to reply if I held down my thumb...
Surely that's not where you put it.
That be like make 25 ne tgreads... one for every answer...
Sorry man.... I can't play, lol

 

[SKIPGOOD]

Know

Yes

 

[SKIPGOOD]

6.7

7.3L

 

[SKIPGOOD]

F350: F350

F350

 

[SKIPGOOD]

Winter

Winter IOWA

 

[SKIPGOOD]

3,000

19K

 

[SKIPGOOD]

Oil

100% synthetic

 

[SKIPGOOD]

16

10.5

 

[SKIPGOOD]

Octane

91-93

 

[SKIPGOOD]

65r

65F/63R