What kind of fuel economy(gas mileage) is everyone getting?

[BlackHillsHntr]

State truck make/model, engine, and transmission please.

[Mike]

7+ (last time I checked) with my 579 and its 550 hp ISX 15 and 18 speed gearbox

[Davesmiththeman]

Regardless of engine/♥♥♥♥♥♥/load weight i get 4ish... if im empty i get more thank goodness...

Oh yea, I have the Peterbilt

[ᅚ]

9 mpg city, 13 highway. 2015 Freightliner M2, Cummins ISB 6.7, Eaton 5-speed auto.

oh wait... whoops!

[ᅚ]

Originally posted by Ornery:

8.0 MPG, W900 625 Cat, 18-speed

Whoa, hold up! We got a real pro here! ;D

[chliju1588]

about 2 mpg , 18 speed , about 90-100 mph

[Leetpandaz]

5.8 with a CAT C15 625 and N14 600 Chipped. highest Ive seen was 8.1 with cruise at 55mph with a 9ton load. W900

[herrmant]

Originally posted by RadulfTheRed:

9 mpg city, 13 highway. 2015 Freightliner M2, Cummins ISB 6.7, Eaton 5-speed auto.

oh wait... whoops!

Kinda old thread, but how is that ISB 6.7 on power?? I imagine pretty gutless since its the same engine in the rams

[ᅚ]

Originally posted by herrmant:

Originally posted by RadulfTheRed:

9 mpg city, 13 highway. 2015 Freightliner M2, Cummins ISB 6.7, Eaton 5-speed auto.

oh wait... whoops!

Kinda old thread, but how is that ISB 6.7 on power?? I imagine pretty gutless since its the same engine in the rams

It's no hot rod Volvo D16, that's for certain. Although for an engine that's being choked with emissions randomness, it doesn't feel like it's working against itself as much as an equivalent Paccar I ran some years ago. I actually climbed a four mile, 2500 ft run empty at full speed this morning (passing cars in a truck FTW!). I've done the same run with a few thousand pounds on and bogged down to maybe ~45-50 mph? Come to think of it, about the only time I get bogged down to less than 40 mph loaded is when I get unlucky and end up stuck on a restricted lane climb behind a poorly maintained semi truck driven by someone who refuses to shift correctly. "Sorry, bud. You can't climb successfully at 1200 rpm with a 45000 lb load" (hehe, pet peeve)

If I remember correctly, it comes in variations from 250 to ~300some HP. Since mine's in a class 6 commercial truck that weighs about 16000 lbs empty (rather than a full-size pickup that might tip 6000-8000), I'd wager it's probably one of the higher power ones.

[Devedw01]

9.4

[Sax_88]

where do i discover my mpg?

[Fixxxer]

I'm running a Kenworth T680 with modded engine and transmission. (Real Eaton fuller Ratios) and (Real Engines & Sounds). So it a Paccar MX13 500 with Eaton fuller Ultrashift VXP 18 speed gearbox with retarder. At the ratio of 3.55. 220 gallon fuel tank with high rise sleeper. I'm getting 6.2mpg consistantly out of this configuration. Which bearing in mind as a driver I tend to have a heavy right foot isn't too bad at all. Green band? Screw the enviroment I have a deadline to meet. The ratio I have chosen is for getting the torque to the drive axles to haul stuff rather than fuel economy. Going in the other direction a 3.05 ratio on the back makes for better fuel numbers at the expense of pulling power. I'd rather take small inclines in 17th than massage my eco credentials but each to their own.

[herrmant]

The Paccar MX will get better fuel millage irl

[SuperTrucker91]

I've got the W900L ARI Legacy sleeper mod, sitting on the 8x4 dual tire lift axle chassis, 400 gallon tanks. Powered by the CAT C18 700hp with a Spicer 14 and 3.20 rears. The lie-o-meter on the dash has been steady at 4.8 since day 1. Hammer down in the big hole the instant says 3.2, however I usually set cruise for 70 on the big road and just ride, like that on flat open highway the instant usually sits between 6.8 and 7.4. Plan on doing an actual distance ÷ fuel burn calculation today.

[SuperTrucker91]

Originally posted by ᅚ:

Originally posted by Ornery:

8.0 MPG, W900 625 Cat, 18-speed

Whoa, hold up! We got a real pro here! ;D

He's probably cruising around 55mph

[SuperTrucker91]

Originally posted by ᅚ:

Originally posted by herrmant:

Kinda old thread, but how is that ISB 6.7 on power?? I imagine pretty gutless since its the same engine in the rams

It's no hot rod Volvo D16, that's for certain. Although for an engine that's being choked with emissions randomness, it doesn't feel like it's working against itself as much as an equivalent Paccar I ran some years ago. I actually climbed a four mile, 2500 ft run empty at full speed this morning (passing cars in a truck FTW!). I've done the same run with a few thousand pounds on and bogged down to maybe ~45-50 mph? Come to think of it, about the only time I get bogged down to less than 40 mph loaded is when I get unlucky and end up stuck on a restricted lane climb behind a poorly maintained semi truck driven by someone who refuses to shift correctly. "Sorry, bud. You can't climb successfully at 1200 rpm with a 45000 lb load" (hehe, pet peeve)

If I remember correctly, it comes in variations from 250 to ~300some HP. Since mine's in a class 6 commercial truck that weighs about 16000 lbs empty (rather than a full-size pickup that might tip 6000-8000), I'd wager it's probably one of the higher power ones.

Power to weight ratio is a catch-all ain't it? Lol