MPG,semi-pickup's
Thread Starter
|
More Turbo
Joined: Jan 2007
Posts: 505
Likes: 6
From: Boulder Junction Wi
MPG,semi-pickup's
was talking with a camper of mine the other day and he was wondering why a newer OTR tractor's pulling 70,000#-80,000#'s can get 5 1/2 - 6 MPG and his 2008 F450 6.4 pulling 16,000#'s get's 7.5 MPG ,or my 2002 F350 7.3 PSD pulling 13,480 #'s at the scale,20,900#'s total getting 9.5-10 MPG,how do the big boy's move that much weight on that amt of fuel????,any idea's?????.
Last edited by poppie; Jan 21, 2008 at 09:47 PM. Reason: typo
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
Well once you get 80,000#s moving, that big engine can probably keep it going without really trying. Buddy of mine drives a Freighliner with a 14L engine... its only 2.33 times my displacement. Throw in 9 forward gears and you can pick a good powerband to stay in.
Posting Guru
Joined: May 2001
Posts: 1,082
Likes: 0
OTR engines have more torque. The same 425 hp also has 1500lb.ft. of torque. Also, the power curves are better optimized and the engine almost never revs over 1800 rpm. All of this with a low rpm cruise speed equals MPG.
Thread Starter
|
More Turbo
Joined: Jan 2007
Posts: 505
Likes: 6
From: Boulder Junction Wi
the avg OTR tractor with empty trailor weigh's about what the avg P/U & 5'th wheel weigh's,add on 50,000#'s of fright to the OTR rig and something does not square,take's X amt of BTW'S to move X amt of weight,anyone from MIT on here,help us out!!!.
Posting Guru
Joined: Jun 2006
Posts: 2,096
Likes: 0
I imagine OTR trucks are optimized for the job they do, as opposed to your typical pickup truck thats setup as a compromise to try and do everything.
Hows the mileage on OTR trucks that meet the 2007 emission standards faired?
Hows the mileage on OTR trucks that meet the 2007 emission standards faired?
Postmaster
Joined: Jan 2004
Posts: 3,207
Likes: 0
From: Kearney, Nebr
Well, in the rig I drive usually gets about 3-4 depending on how hard you push her. The newer mercedes diesels are supposedly the best on fuel milage.
You might be able to find a little daycab with a light, light aluminum trailer to wiegh 20,000 empty (or a flatbed).
Orig, I think you hit it on the nail. OTR have the gearing and the powerband right where you need it. Out of our two trucks, both Pete's, one is definitely the highway king and the other is the backroad overweight pulling machine.
I can't help ya with the emission question. I don't know of anyone that has purchased a brand new truck.
You might be able to find a little daycab with a light, light aluminum trailer to wiegh 20,000 empty (or a flatbed).
Orig, I think you hit it on the nail. OTR have the gearing and the powerband right where you need it. Out of our two trucks, both Pete's, one is definitely the highway king and the other is the backroad overweight pulling machine.
I can't help ya with the emission question. I don't know of anyone that has purchased a brand new truck.
Trending Topics
Postmaster
Joined: Oct 2005
Posts: 3,724
Likes: 0
From: Clarksburg WV
Speaking of square, that's another thing...a truck with a box trailer is like a brick moving at 70 mph. Has to be a lot of drag on that thing.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
i ain't rite
Joined: Mar 2005
Posts: 65,511
Likes: 5,567
From: Marlboro Mental Hospital.
my mack running loaded at 80,000 all the time will only get 2 1/2 to 3 mpg.
but if i go out and drive around for 10 hours empty(23,480lbs) with the cruise set at 65mph, it will get almost 11 mpg.
but if i go out and drive around for 10 hours empty(23,480lbs) with the cruise set at 65mph, it will get almost 11 mpg.
Senior User
Joined: Feb 2005
Posts: 405
Likes: 0
Originally Posted by tjc transport
my mack running loaded at 80,000 all the time will only get 2 1/2 to 3 mpg.
but if i go out and drive around for 10 hours empty(23,480lbs) with the cruise set at 65mph, it will get almost 11 mpg.
but if i go out and drive around for 10 hours empty(23,480lbs) with the cruise set at 65mph, it will get almost 11 mpg.
i ain't rite
Joined: Mar 2005
Posts: 65,511
Likes: 5,567
From: Marlboro Mental Hospital.
2004 RD686 with a 400hp renault/mack pos diesel, an eaton fuller 8LL trans, 44k rear suspension, 12.00X24.5 rubber on the rear, with floaters on front and the air tag. . not sure on the gear ratio off the top of my head, but top speed is 74mph.
i carry 120 gallons of fuel, and the worst i ever got was the day i ran loaded for 480 miles, and used 198 gallons. the bast i ever got was coming home from Port Jarvis N.Y.
i filled up at the end of the shift, and went into the hotel for some shut eye. after i got some sleep, i drove home. 100 miles, and only took 9 gallons.
i carry 120 gallons of fuel, and the worst i ever got was the day i ran loaded for 480 miles, and used 198 gallons. the bast i ever got was coming home from Port Jarvis N.Y.
i filled up at the end of the shift, and went into the hotel for some shut eye. after i got some sleep, i drove home. 100 miles, and only took 9 gallons.
Last edited by tjc transport; Jan 22, 2008 at 03:54 PM.
Posting Guru
Joined: May 2001
Posts: 1,082
Likes: 0
Originally Posted by tjc transport
2004 RD686 with a 400hp renault/mack pos diesel, an eaton fuller 8LL trans, 44k rear suspension, 12.00X24.5 rubber on the rear, with floaters on front and the air tag. . not sure on the gear ratio off the top of my head, but top speed is 74mph.
i carry 120 gallons of fuel, and the worst i ever got was the day i ran loaded for 480 miles, and used 198 gallons. the bast i ever got was coming home from Port Jarvis N.Y.
i filled up at the end of the shift, and went into the hotel for some shut eye. after i got some sleep, i drove home. 100 miles, and only took 9 gallons.
i carry 120 gallons of fuel, and the worst i ever got was the day i ran loaded for 480 miles, and used 198 gallons. the bast i ever got was coming home from Port Jarvis N.Y.
i filled up at the end of the shift, and went into the hotel for some shut eye. after i got some sleep, i drove home. 100 miles, and only took 9 gallons.
Thread Starter
|
More Turbo
Joined: Jan 2007
Posts: 505
Likes: 6
From: Boulder Junction Wi
Originally Posted by tjc transport
my mack running loaded at 80,000 all the time will only get 2 1/2 to 3 mpg.
but if i go out and drive around for 10 hours empty(23,480lbs) with the cruise set at 65mph, it will get almost 11 mpg.
but if i go out and drive around for 10 hours empty(23,480lbs) with the cruise set at 65mph, it will get almost 11 mpg.
Posting Guru
Joined: Jun 2007
Posts: 1,501
Likes: 2
From: Henderson, NV
Originally Posted by poppie
was talking with a camper of mine the other day and he was wondering why a newer OTR tractor's pulling 70,000#-80,000#'s can get 5 1/2 - 6 MPG and his 2008 F450 6.4 pulling 16,000#'s get's 7.5 MPG ,or my 2002 F350 7.3 PSD pulling 13,480 #'s at the scale,20,900#'s total getting 9.5-10 MPG,how do the big boy's move that much weight on that amt of fuel????,any idea's?????.
