What's the best MPG you've ever seen? What's your average and what do you drive?
Posted by AverageVoid@reddit | Truckers | View on Reddit | 31 comments
Dash showed 23.4 mpg when I looked down coming from Flagstaff towards Winslow in my Kenworth with an MX13 today.
mxadema@reddit
Best, 4mpg. Worst, like 0.25mph.
Doing heavy haul in the Appalachian mountains.
Kitchen-utensil@reddit
Are all those scary stories true about the Appalachian mountains true? Have you seen anything weird?
mxadema@reddit
Not much more unusual than a concrete jungle. From wild animal, to cougars, dope head, big foot, and general redneck.
Definitelyabotnocap@reddit
12mpg in a 2024 579 with an auto mx13 loaded at 75k in nebraska.
RealSharpNinja@reddit
Lots of tail wind?
Definitelyabotnocap@reddit
No. Just a light foot, super singles, aero package, and flat ground.
RealSharpNinja@reddit
Current rig: 2024 Cascadia DD15 DT12 gets 8.1mpg overall life of truck over 212,000 miles.
Previous: 2024 LT C10 Edition X15 Endurance HD got 7.1 mpg over life of truck.
That said, the LT basically lived on I81, whereas the Cascadia mostly midwest and midsouth.
homucifer666@reddit
Best? 14.9mpg. Average is around 10-11, even when fully loaded. Currently driving a 2025 Cascadia.
RealSharpNinja@reddit
Where and what transmission?
oneshotpapo@reddit
Is mine accurate? Idk. But was using a 23 cascadia. Averaged 5mph loaded, 8 unloaded. Governed 65.
Got a 25 now but im also company and let my truck idle because I like to he comfy in the back lol
GainfulyUnemployed@reddit
8.7mpg calculated on fuel burn, leaving Sparks, NV with tarped supersacks @ 80k gross headed east to Detroit with a tail wind all the way across from Wyoming on. Almost made up for the 4mpg on the trip west with a tarped 11'W X 10'H crate that didn't weigh 30k lbs.
XiangJiang@reddit
How am I reading 4mpg answers? Do they mean going up a hill? 8.1 is average for me over the course of 64k mikes.
SashaDabinsky@reddit
Best: 99.9 MPG going downhill in a Cascadia
Worst: under 1/2 MPG uphill in a Peterbilt weighing over 123,000 lbs.
Kershaws_Tasty_Ruben@reddit
I had a 40 mile an hour tail wind once going across Nebraska. With 6k in the box I got something like 18mpg. If I had been going in any other direction it would have sucked.
Scurvy_Pete@reddit
Average 5.5ish. Best was like 13 bobtailing. ‘86 W900 short hood, 3406B
ironeagle2006@reddit
Best I got was 15 empty worse was 8 average 10 with a 665 prototype Detroit in 99-00
clarobert@reddit
Over 12 even when loaded - a friend of mine is hyper focussed on mileage and it makes a difference in the tens of thousands of dollars per year for his single truck OO operation. He's in a '23 Volvo.
The biggest mileage factor, without a question is speed. He drives by his tachometer and boost guage, rarely looking at his speedometer other than to ensure he's under the speed limit in urban areas.
SixSpeeddriver10@reddit
People generally really underestimate the impact of air resistance or drag. It has a huge effect on vehicle efficiency and at much speeds than you'd guess (it's why bicycle racing is a team sport) And all else being equal, drag goes up with the square of velocity.
icy_penguins@reddit
My computer used to tell me i was getting 265mpg when id let off the throttle and coast. But then go right back to 2.8 when I applied downward force with my right foot. I average 5ish Im 50/50 loaded/empty pulling tanks. 80-90k when loaded
2006 379 pete with 800hp cummins
skeletons_asshole@reddit
I'm around 6.6mpg average in a Paccar pete with a short sleeper and flatbed, and that takes a shit ton of work.
Used to sit at 7.2-7.4 in a Cascadia with a dry van behind it.
Old-Wolf-1024@reddit
Best….9
Worst…..1.2
Avg…..4-4.5
2024 Pete 389 w/Cummins 13 spd Eaton
Extra_Significance81@reddit
2023 KW T680 Cummins X15 best loaded MPG is around 8.5 at 80k lbs on I 10 with a tail wind. Obviously get much better when "coasting" downhill. Worst is around 2.5 going west towards the Rockies into a head wind.
pianodude01@reddit
1.2 loaded, 4 empty. 0.1 up hills.
2019 Pete 367 heavy haul. Usually around 260k lbs when loaded
Definitelyabotnocap@reddit
What's the income like? Worth the responsibility?
pianodude01@reddit
Income is decent, I find it a lot of fun, and challenging, very fulfilling too. Lots of downtime tho, so if thats not your thing
FlappyJ1979@reddit
My 02 Pete 387 with a C-15 built to a C-18 averaged 7.9 mpg for the last 3 years I owned it. Now I have a 2018 cascadia with dd15 and dt12 and can’t break 7.4 with it
InvestigatorBroad114@reddit
Like 4-5 mpg. Peterbilt 367 heavy rock haul
iTNB@reddit
Leaving Wyoming into Nebraska with like 22k lbs. just coasting and got up to 29.5 mpg until it got flat again then I went down to 7.6.
RedlineM5@reddit
13.5 mpg running light across the Midwest. 23 Cascadia DD15 DT12. Usually low 9s.
LLCoolDave82@reddit
Generally I get around 4mpg. 2000 KW hauling dirt. Usually around 125k GVW.
BigSchmitty@reddit
I’ve seen 8.5 pulling an empty on the highway. I average 6.8 between grossing 76k loaded and around 35k empty. 2022 Freightliner Cascadia day cab, Detroit D13 with a Detroit DD12 automated 12-Speed.