MPG 2017 3500s pulling 22,800

transamz9 wrote:

4x4ord wrote:
550 HP. I'm sure that with higher gearing the Kenworth would do better. I think it is disgusting that these little pickups burn so much fuel.

I don't understand how you are coming up with " these little pickups burn so much fuel." ? I'm running combined in the 28-29,000# range and I have never gotten below 8.5 average on a tank of fuel and that is running 70+. It takes so much power to move a load and that amount of power is going to use a curtain amount of fuel.

The pick ups in the test that TFL Truck got 5.7 to 6.7 miles per gallon. I expected that a car like pickup should get better fuel economy than a heavy duty truck if both are loaded the same.....especially when the heavy truck has a powertrain set up for much heavier work than 33000 lbs. An engine delivers much more horsepower hours per gallon of fuel when it is working harder. The Cummins in the Kenworth is not running very efficient when it is turning 1600 rpm and only has to make 150 HP.

CampingN.C. wrote:
I'd like to have the fuel tank off the Ford, that's about it. ;)

That's more than what I want from the Ram. :B

Cummins12V98 wrote:

transamz9 wrote:

4x4ord wrote:
550 HP. I'm sure that with higher gearing the Kenworth would do better. I think it is disgusting that these little pickups burn so much fuel.

I don't understand how you are coming up with " these little pickups burn so much fuel." ? I'm running combined in the 28-29,000# range and I have never gotten below 8.5 average on a tank of fuel and that is running 70+. It takes so much power to move a load and that amount of power is going to use a curtain amount of fuel.

Is that HAND calc filling tank to top over several tanks? Or are you using the EVIC? My EVIC is fairly consistent at .4 better than reality.

After running several tanks of right at 70 gallons (truck tank and aux tank) my evic has always been with-in .1 +-. I don't run the hills out west but here in Kentucky/Tenn they are rolling and there are some good ones just not miles long.

transamz9 wrote:

4x4ord wrote:
550 HP. I'm sure that with higher gearing the Kenworth would do better. I think it is disgusting that these little pickups burn so much fuel.

I don't understand how you are coming up with " these little pickups burn so much fuel." ? I'm running combined in the 28-29,000# range and I have never gotten below 8.5 average on a tank of fuel and that is running 70+. It takes so much power to move a load and that amount of power is going to use a curtain amount of fuel.

Is that HAND calc filling tank to top over several tanks? Or are you using the EVIC? My EVIC is fairly consistent at .4 better than reality.

4x4ord wrote:
550 HP. I'm sure that with higher gearing the Kenworth would do better. I think it is disgusting that these little pickups burn so much fuel.

I don't understand how you are coming up with " these little pickups burn so much fuel." ? I'm running combined in the 28-29,000# range and I have never gotten below 8.5 average on a tank of fuel and that is running 70+. It takes so much power to move a load and that amount of power is going to use a curtain amount of fuel.

550 HP. I'm sure that with higher gearing the Kenworth would do better. I think it is disgusting that these little pickups burn so much fuel.

4x4ord wrote:
We have a 2012 Kenworth. It has a 15 liter Cummins coupled to an 18 speed and 3 drive axles with 4.10 gear ratios. The truck is not really set up for highway use and is not capable of hauling much weight legally. We seldom take it on the road. It has a top speed of only 68 mph @ about 1600 rpm. The empty weight of the truck is very close to 33000 lbs. It has a 20,000 lb front axle and 69,000 lb rears. On Alberta highways it requires a permit to be able to load the truck to 66800 lbs. We use the truck mainly off road and load it to about 95,000 lbs. I took it down the highway empty the other day and measured it's fuel economy ..... 9.6 mpg (imperial) or 8 mpg US.

8 MPG is not bad for that configuration. You can get a PACCAR dealer to up the speed limit above 68 mph or you can do it yourself if you have Cummins Insite. What power rating is the ISX?

I'd like to have the fuel tank off the Ford, that's about it. ;)

4x4ord wrote:
We have a 2012 Kenworth. It has a 15 liter Cummins coupled to an 18 speed and 3 drive axles with 4.10 gear ratios. The truck is not really set up for highway use and is not capable of hauling much weight legally. We seldom take it on the road. It has a top speed of only 68 mph @ about 1600 rpm. The empty weight of the truck is very close to 33000 lbs. It has a 20,000 lb front axle and 69,000 lb rears. On Alberta highways it requires a permit to be able to load the truck to 66800 lbs. We use the truck mainly off road and load it to about 95,000 lbs. I took it down the highway empty the other day and measured it's fuel economy ..... 9.6 mpg (imperial) or 8 mpg US.

You could run 73,280 here on the interstate and 80,000 on the other roads.

We have a 2012 Kenworth. It has a 15 liter Cummins coupled to an 18 speed and 3 drive axles with 4.10 gear ratios. The truck is not really set up for highway use and is not capable of hauling much weight legally. We seldom take it on the road. It has a top speed of only 68 mph @ about 1600 rpm. The empty weight of the truck is very close to 33000 lbs. It has a 20,000 lb front axle and 69,000 lb rears. On Alberta highways it requires a permit to be able to load the truck to 66800 lbs. We use the truck mainly off road and load it to about 95,000 lbs. I took it down the highway empty the other day and measured it's fuel economy ..... 9.6 mpg (imperial) or 8 mpg US.