Phenominal MPG With My New Truck!

[Aufgeblassen]

My old Volvo (an '01 660 w/ 465 HP Volvo engine) got 10.3 MPG bobtailing, both 5+ years ago @ 538,000 miles, and recently at 1,066,000 miles.

My new Volvo (a bigger '06 780 w/ 465 HP Volvo engine) gets 11.5 bobtailing!

Now if this 11.6% increase corresponds to loaded miles, I'll be in hog's heaven.

[Windwalker]

Ya know...

Years ago, when we wanted to have fun with somebody, we'd put a gallon of fuel in for him, on a daily basis. He'd be getting fantastic fuel economy... Then, after about 6 months or so, we'd stop putting the fuel in.

A guy can go completely bald trying to figure out where the fuel economy went...

[Steel Horse Cowboy]

Ya know...

Years ago, when we wanted to have fun with somebody, we'd put a gallon of fuel in for him, on a daily basis. He'd be getting fantastic fuel economy... Then, after about 6 months or so, we'd stop putting the fuel in.

A guy can go completely bald trying to figure out where the fuel economy went...

Thats soooo mean

I have a guy I run with each week and he just bought a new fancy streched out 389EXHD for $155k. We were at the shop and he ran in to go use the bathroom so I turned his truck off, then kicked the key back to the ON position. You should have seen him when he came out. I did it again at the Petro when we stopped for fuel, and again at the rest area..... he was sooooooo pissed and cursed the damn Peterbilt dealer and blah blah blah. Finally at dinner I confessed to doing it and he laughed his ass off. Now I'm just waiting to see what he has in store for me

[Steel Horse Cowboy]

My old Volvo (an '01 660 w/ 465 HP Volvo engine) got 10.3 MPG bobtailing, both 5+ years ago @ 538,000 miles, and recently at 1,066,000 miles.

My new Volvo (a bigger '06 780 w/ 465 HP Volvo engine) gets 11.5 bobtailing!

Now if this 11.6% increase corresponds to loaded miles, I'll be in hog's heaven.

I'm guessing your pulling a freight box, and lets say you average 35,000lbs loaded in the box, at 65mph I bet you get about 7.0 - 7.2mpg


I'm dragging a dry-bulk tank and go down at 3800lbs in the tank, and empty back 2,200miles round trip with a flat-top FLD and 3.90 rears. I set my cruise at 63mph and I'm getting an average between 8.2 - 8.5mpg

[Aufgeblassen]

I'm guessing your pulling a freight box, and lets say you average 35,000lbs loaded in the box, at 65mph I bet you get about 7.0 - 7.2mpg

Actually, I would get around 7.2 MPG pulling a dry van that is fully loaded (45,000 LBS) in my old truck. But I expect to do better than that with new one.

[Steel Horse Cowboy]

Actually, I would get around 7.2 MPG pulling a dry van that is fully loaded (45,000 LBS) in my old truck. But I expect to do better than that with new one.

Well here is to hoping you do

God knows we can all use a little more $$$

[flood]

Actually, I would get around 7.2 MPG pulling a dry van that is fully loaded (45,000 LBS) in my old truck. But I expect to do better than that with new one.

you'll get 6.6-6.8 with that truck. check the dash readout for avg mpg and that will tell you what it's avg has been and no it's not my old one. mine was 60351 and avg mpg for the 231,000 i had it was 6.7...

[Copperhead]

No dispute with high mpg numbers, but first question that comes up in my mind when I read about mpg figures is whether these figures are off of the ECM displays or actual pump to pump hand calculated. My truck consistently shows 8 - 8.5 mpg on the display (even idle time figured on that), yet the hand calculations, fill up to fill up, show averages of around 7.5 mpg. The display sure can be fun to see, but it has to be tempered with real world figures. I have seen only a slim few displays that show mpg that is close to real figures.

[repete]

No dispute with high mpg numbers, but first question that comes up in my mind when I read about mpg figures is whether these figures are off of the ECM displays or actual pump to pump hand calculated. My truck consistently shows 8 - 8.5 mpg on the display (even idle time figured on that), yet the hand calculations, fill up to fill up, show averages of around 7.5 mpg. The display sure can be fun to see, but it has to be tempered with real world figures. I have seen only a slim few displays that show mpg that is close to real figures.

X2, I watched my readout a lot tonight and it went as low as 4.2 and as high as ( hope your sitting down) 98.9 MPG! course that was rolling down hill but if true even considering most of my run's on flat ground I should still be about 25 or 30average. To bad it dosn't work that way! My QC say's 7.7 but pen and paper comes out to 7.2 still pretty good.

[RockyMtnProDriver]

How about 255 mpg at 71 mph?MPG.jpg

[razorwyr]

How about 255 mpg at 71 mph?MPG.jpg

Where can you get one of those trucks?

[Steel Horse Cowboy]

No dispute with high mpg numbers, but first question that comes up in my mind when I read about mpg figures is whether these figures are off of the ECM displays or actual pump to pump hand calculated. My truck consistently shows 8 - 8.5 mpg on the display (even idle time figured on that), yet the hand calculations, fill up to fill up, show averages of around 7.5 mpg. The display sure can be fun to see, but it has to be tempered with real world figures. I have seen only a slim few displays that show mpg that is close to real figures.

My 8.2 - 8.5 is figured on pump to pump...... it doesn't even have a computer LOL
I pull a dry bulk tanker from Chicago to S. Texas loaded at 4,000lbs and come back empty in a 99FLD Flat-top with a S-60, 10spd and 3.90 rears (hence the 63mph LOL)

Pays $3.75 loaded and just FSC coming back. I do ok

[RockyMtnProDriver]

Just look on any downhill run on I-25 in Wyoming. Just make sure you turn OFF the MPG reading on the ensuing uphill part.

Actually, it looks like this tractor is getting about 6.5 (Imperial) average with the loads I am pulling. That is one of the reasons for getting the new tractor. This one has the wrong gears (3.90's) for the freeways.

I am running about 1490 rpm at 65 mph. Now, it pulls like a freight train when I hammer down to get past the governed trucks ( I opened mine right up ) but I can accomplish that with a downshift if I go to 8th direct when I pass.

I am going to get an 18 speed autoshift in the new tractor. (gloss went off the shifting apple about 2 million miles ago )

[Steel Horse Cowboy]

I am going to get an 18 speed autoshift in the new tractor. (gloss went off the shifting apple about 2 million miles ago )

The IH I just sold had 3.23's and a auto-shift. I hated it at first, but grew to LOVE it.
It was a GEN2 series with the clutch pedal still and once I got the MANUAL mode down, it was the same as driving a reg stick w/o the shifting, missing a gear or grinding.

Just think of this, I was running a load of casustic across I80 from North Platte to the Bay. Not once did it miss a shift going up or coming down a hill, It was GREAT!!!!!! It's when you dont have to worry about hitting it juuuust right to slide it into the next gear when pulling 80,000lbs up Donner

[Aufgeblassen]

you'll get 6.6-6.8 with that truck. check the dash readout for avg mpg and that will tell you what it's avg has been and no it's not my old one. mine was 60351 and avg mpg for the 231,000 i had it was 6.7...

But I'll bet you had a relatively massive amount of idle time that lowered your avg. MPG quite significantly. I, on the other hand, have very little idle time, comparatively, so I should get that much better avg. MPG.

[flood]

not all that much, around 18-24hr's a week back then unless you count driving in Los Angeles as idle time. r avg load back then was around 42-44,000 lb's right now r 09 pro-star running with 24,814 lb. @ avg of 62.2 mph (filled up in Minooka, IL to Cheyenne, WY.) 921 ml used 137 gl. that's 6.72 mpg. with 1/2 hr of idle time for driver change.

[Steel Horse Cowboy]

not all that much, around 18-24hr's a week back then unless you count driving in Los Angeles as idle time. r avg load back then was around 42-44,000 lb's right now r 09 pro-star running with 24,814 lb. @ avg of 62.2 mph (filled up in Minooka, IL to Cheyenne, WY.) 921 ml used 137 gl. that's 6.72 mpg. with 1/2 hr of idle time for driver change.

WOW, that Pro-Star sure is not doing so great on the MPG. My dad has been driving for Wal-MArt for about 20yrs now and his 07 Pro Star is averaging 7.2 - 7.5mpg ????

[flood]

ya i know and thats with an ISX 450 untrashift and super (stuped) singles btw the dash saids something like 7.5 but i track it from fuel stop to fuel stop.

[RockyMtnProDriver]

The IH I just sold had 3.23's and a auto-shift. I hated it at first, but grew to LOVE it.
It was a GEN2 series with the clutch pedal still and once I got the MANUAL mode down, it was the same as driving a reg stick w/o the shifting, missing a gear or grinding.

Just think of this, I was running a load of casustic across I80 from North Platte to the Bay. Not once did it miss a shift going up or coming down a hill, It was GREAT!!!!!! It's when you dont have to worry about hitting it juuuust right to slide it into the next gear when pulling 80,000lbs up Donner

That is the gear ratio I am thinking of running.

What did you get for Fuel economy on average? Tire size? And RPM at 65 mph? Which HP engine did you have? I am getting the Maxxforce 475 HP.