Krost Way Posted December 29, 2023 Share Posted December 29, 2023 Just curious and having fun with it. What engine and what fuel economy do you see? I am new to all this and wondering what is will take to run down the road. Thanks Quote Link to comment Share on other sites More sharing options...
Brocky Posted December 30, 2023 Share Posted December 30, 2023 It varies greatly from truck to truck depending on the load weight hauled and terrain operated on. You are listing a B 67 as your truck.. Bob-tailing to shows I would hazard a guess of 10 to 12 MPG???? In ANY situation your fuel mileage will depend a lot on how heavy your right toe is!!!!! Be EASY AND GENTLE!!!! 1 1 Quote Brocky Link to comment Share on other sites More sharing options...
BOBWhite Posted December 30, 2023 Share Posted December 30, 2023 I know your asking about a B model but I found this in an article about the Mh cabover 7.7 Is great by todays standards, but in an 80s cabover it is incredible! A pyrometer is a big help when learning how to drive efficiently if your truck has one. 1 Quote Link to comment Share on other sites More sharing options...
hicrop10 Posted December 30, 2023 Share Posted December 30, 2023 My b87 dragging our low boy trailer empty was around 3-5 mpg loaded with say a cat d9 dozer it 1-2 mpg.Engine was a Cummins 335. 2 Quote Link to comment Share on other sites More sharing options...
mowerman Posted December 30, 2023 Share Posted December 30, 2023 Probably doesn’t answer(YOUR) question , but I thought I’d throw this out there my Peterbilt with triple trailers flat ground it gets between six and seven pull a hill it goes right down to 2.6 ha ha at least that’s what the dashboard says if you’re looking for an average on the job, it’s usually between five and six… like these guys said, and all the depends on what you’re doing with it pretty much. Bob Quote Link to comment Share on other sites More sharing options...
Popular Post JoeH Posted December 30, 2023 Popular Post Share Posted December 30, 2023 (edited) My volumetric concrete trucks get about 3.5mpg annually. We have a 15 mile radius, and a typical delivery is drive 20-40 minutes to a job, sit at the job for an hour or so idling/revved around 1300 rpms, drive back to the yard to reload for next job. Or drive straight to next job from previous. 1979 R686ST with endt676 gets best around 4-4.5mpg but it's the lightest maxing at 50,000 lbs 1995 RD688S with E7-350 and 8LL gets around 3.5mpg but maxes around 73,280 lbs 2003 MR688 AI-350 with Allison HD4560 auto gets worst at sub 3, maxing close to 73,280. That auto is nice but sucks on economy. Note that our trucks are almost never empty, whatever material a customer doesn't use gets lugged on back for the next load. Frequently as much as 8,000 lbs of extra material getting carried around. Edited December 30, 2023 by JoeH 4 Quote Link to comment Share on other sites More sharing options...
mrsmackpaul Posted December 30, 2023 Share Posted December 30, 2023 320 coolpower, even pulling a road train at max load it is never worse tuan 4.5 MPG Running along empty with the float on is 7 plus, single trailer fully loaded is 6 - 6.5 MPG Speed and wind resistance are the killers, no faster than 60 MPH for good economy, thats why in the fuel crisis days of the 70s the limit in the U.S. was 55 MPH I believe and a little bit slower here Paul 1 1 Quote Link to comment Share on other sites More sharing options...
mechohaulic Posted December 30, 2023 Share Posted December 30, 2023 glad it's posted as a "fun question" ! no offence can't see an acuate answer without more specifics. same as a question of "how drunk can I get with only half bottle of bourbon ?? 😱😂 1 Quote Link to comment Share on other sites More sharing options...
Popular Post mrsmackpaul Posted December 31, 2023 Popular Post Share Posted December 31, 2023 4 minutes ago, mechohaulic said: "how drunk can I get with only half bottle of bourbon ?? 😱😂 I can get pretty messed up on less than half a bottle of Beam I think Im fine but the evil eye of the Princess tells a different story Hmmmm Bourbon Miss Molly tabulating the fuel useage for me Paul 1 1 2 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted December 31, 2023 Share Posted December 31, 2023 Jim Beam?? Kentucky Bourbon from the State's, Paul??? You make me proud... I know Jim Beam personally. 1 Quote Link to comment Share on other sites More sharing options...
mrsmackpaul Posted December 31, 2023 Share Posted December 31, 2023 Yes Joey, the same deal, it really is my go to problem solving fluid lol Paul 1 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted December 31, 2023 Share Posted December 31, 2023 Amen Paul... Quote Link to comment Share on other sites More sharing options...
Popular Post JoeH Posted December 31, 2023 Popular Post Share Posted December 31, 2023 16 hours ago, mrsmackpaul said: 320 coolpower, even pulling a road train at max load it is never worse tuan 4.5 MPG Running along empty with the float on is 7 plus, single trailer fully loaded is 6 - 6.5 MPG Speed and wind resistance are the killers, no faster than 60 MPH for good economy, thats why in the fuel crisis days of the 70s the limit in the U.S. was 55 MPH I believe and a little bit slower here Paul +1 on 55 mph. If you've ever ridden a motorcycle on the highway then you know this first hand. Wind resistance on your body is negligible up to 55 mph, start getting above that and your arms start getting a workout to keep you in the saddle. 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Freightrain Posted December 31, 2023 Popular Post Share Posted December 31, 2023 2 hours ago, JoeH said: +1 on 55 mph. If you've ever ridden a motorcycle on the highway then you know this first hand. Wind resistance on your body is negligible up to 55 mph, start getting above that and your arms start getting a workout to keep you in the saddle. On my HD Softail, my inner thigh muscle get sore holding my legs inward after about an hour in the highway. Darn near need a rachet strap to go longer LOL! My B model with 237, 4.10 gears run 1800 rpm at 65 mph gets a solid 8mpg with trailer(30k total). 2 1 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
mrsmackpaul Posted December 31, 2023 Share Posted December 31, 2023 I dunno if the same research was done in the fuel crisis of the 70's in the U.S. as was done in Australia But with out a doubt the single biggest factor for fuel economy was speed There were graphs and charts and all types of things To go from 55 - 65 took nearly twice the power just to overcome wind resistance So I wonder just how fuel efficient trucks of today would be driven at 55 50 - 55 was little change Under 50 wind resistance made little difference Personally I find it much easier on me to drive a little slower, a lot more time to react to things and Im not on edge watching the speed and the cops and well trying to pass people all the time And I always see the same vehicle's along the road that broke sound barrier passing me Paul 2 Quote Link to comment Share on other sites More sharing options...
mowerman Posted December 31, 2023 Share Posted December 31, 2023 7 hours ago, JoeH said: +1 on 55 mph. If you've ever ridden a motorcycle on the highway then you know this first hand. Wind resistance on your body is negligible up to 55 mph, start getting above that and your arms start getting a workout to keep you in the saddle. I used to ride. We had to stay overnight halfway through day. The wind was blowing too hard going from San Diego to Reno. Quote Link to comment Share on other sites More sharing options...
JoeH Posted January 1 Share Posted January 1 I quit riding 7 or 8 years ago, got married, got little kids now, but mostly I don't like other drivers. Everyone texts and drives, Grandma is just as bad as the grandkids. 2 Quote Link to comment Share on other sites More sharing options...
The Rubber Duck 006 Posted January 6 Share Posted January 6 The Green Hornet which has the MP8 at 445hp under the hood and a 13spd gets 5-6mpg. She used to get like 2-3 if that but after changing the egr it went up. 2 Quote Link to comment Share on other sites More sharing options...
yarnall Posted January 7 Share Posted January 7 My father says his B85 fire tractor with no ladder gets 4 mpg. It has a 707 gas job and a 5 speed. Mike 1 Quote Link to comment Share on other sites More sharing options...
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