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gsbrockman
Downtown Sand Gap, KY USA...
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Mike in DE wrote:However, I checked those figures with eight stops at the pump (1400 miles in total), manually calculated the MPG and found there was good agreement between the two (within 1% on average).
So......eight stops at the pumps over 1,400 miles averages out to about 175 miles.....I’m so confused.
2022 RAM 5500 Tradesman Cab & Chassis, 6.7L CTD & AS69RC, 4.44 ratio, 225/70R19.5 Hankooks, 60 inch C/A, 52+22 gal tanks, Aluminum Wheels, CM SK Series bed w/B&W Turnover Ball. 63,910 miles and 1,124 hours as of December 30th, 2022. (Average MPH = 56.9)
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JBarca
Radnor, Ohio, USA
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gsbrockman wrote:Mike in DE wrote:However, I checked those figures with eight stops at the pump (1400 miles in total), manually calculated the MPG and found there was good agreement between the two (within 1% on average).
So......eight stops at the pumps over 1,400 miles averages out to about 175 miles.....I’m so confused.
Here is a "maybe" as to why,
175 miles between stops when towing, could be explained as the driver needing a break, or having a small fuel tank and fueling up at half a tank just to be safe.
On my gasser, it has a drinking problem (7 - 8 mpg) with a small tank. I would not push 175 miles between fillups as a routine as I'm selective on which gas station I can fit in and get out of. With my mileage, I would start getting a low fuel warning at about 1/4" tank which is about 175 miles. I always want a reserve of fuel in case I get stuck out on the road or I can't fit in the nearest gas station, I can go to the next, etc. Between 100 - 125 miles (about a 1/2 tank mark) I'm stopping for a top-off on days when I tow over 200 miles in a day. We all camp and tow different, and all are OK.
The OP is getting a whole lot more miles per gallon than my gasser. Their MPG is not quite double mine, but close. I suspect their tolerance zone, is at the 175 area either for a truck reason or their need, or a pet's need, to get out and walk around.
Just a thought.
John & Cindy
2005 Ford F350 Super Duty, 4x4; 6.8L V10 with 4.10
CC, SB, Lariat & FX4 package
21,000 GCWR, 11,000 GVWR
Ford Tow Command
1,700# Reese HP hitch & HP Dual Cam
2 1/2" Towbeast Receiver
2004 Sunline Solaris T310SR
(I wish we were camping!)
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Mike in DE
Delaware
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I can't seem to reply directly to gsbrockan's comments but I'll do it here where John Barca made his accurate and thoughtful assumption. I made eight stops for the exact reason he stated - taking a break from driving. The stops at the pump were NOT fill-ups, rather, they were only partials. I'm convinced the biggest variability was how consistently I topped off the tank. I took it right to the top until it was within a 1/2 inch of spilling out. Bottom line is - the DIC was as accurate as the manually calculated MPG.
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Grit dog
Black Diamond, WA
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Jeebus, I can’t get much more than 175 miles out of my diesel when towing and I’m lookin for fuel!
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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Cummins12V98
on the road
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gsbrockman wrote:Mike in DE wrote:However, I checked those figures with eight stops at the pump (1400 miles in total), manually calculated the MPG and found there was good agreement between the two (within 1% on average).
So......eight stops at the pumps over 1,400 miles averages out to about 175 miles.....I’m so confused.
Hey GS good to see you on here, miss you on the TDR! Looks like a new truck in your sig. RR
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"
"HeavyWeight" B&W RVK3600
2016 MobileSuites 39TKSB3 highly "Elited" In the stable
2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD
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gsbrockman
Downtown Sand Gap, KY USA...
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Cummins12V98 wrote:gsbrockman wrote:Mike in DE wrote:However, I checked those figures with eight stops at the pump (1400 miles in total), manually calculated the MPG and found there was good agreement between the two (within 1% on average).
So......eight stops at the pumps over 1,400 miles averages out to about 175 miles.....I’m so confused.
Hey GS good to see you on here, miss you on the TDR! Looks like a new truck in your sig. RR
Yes.....my wife suggested that I might need to be looking for a new one.
Ordered September 18, 2021
Rolled off the line December 09, 2021 at 16:00 Central Time
Hitched a ride with some hobos on a rail car December 27, 2021
Arrived in Nashville, TN 01/02/22
Sat at the Nashville Rail Yard for 72 days
Arrived at my dealership in Somerset, Ky on March 15, 2022
Took delivery March 25, 2022 (slight delay as dealership installed my flatbed)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=1920,height=1920,fit=scale-down/https://www.cumminsforum.com/attachments/1932dfeb-0302-49f0-844f-3a6743853d1b-jpeg.947674 width=640/)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=1920,height=1920,fit=scale-down/https://www.cumminsforum.com/attachments/f55b6d7e-b23d-443f-a123-15dcfc016e3a-jpeg.947747/ width=640)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=1920,height=1920,fit=scale-down/https://www.cumminsforum.com/attachments/6161082f-845d-4455-8109-8716c080171f-jpeg.947748/ width=640)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=1920,height=1920,fit=scale-down/https://www.cumminsforum.com/attachments/f8251241-9588-4ea8-b9a2-43d6e22fa560-jpeg.948392/ width=640)
* This post was
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Bobbo
Wherever I park
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Joined: 09/16/2007
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gsbrockman wrote:Cummins12V98 wrote:gsbrockman wrote:Mike in DE wrote:However, I checked those figures with eight stops at the pump (1400 miles in total), manually calculated the MPG and found there was good agreement between the two (within 1% on average).
So......eight stops at the pumps over 1,400 miles averages out to about 175 miles.....I’m so confused.
Hey GS good to see you on here, miss you on the TDR! Looks like a new truck in your sig. RR
Yes.....my wife suggested that I might need to be looking for a new one.
Ordered September 18, 2021
Rolled off the line December 09, 2021 at 16:00 Central Time
Hitched a ride with some hobos on a rail car December 27, 2021
Arrived in Nashville, TN 01/02/22
Sat at the Nashville Rail Yard for 72 days
Arrived at my dealership in Somerset, Ky on March 15, 2022
Took delivery March 25, 2022 (slight delay as dealership installed my flatbed)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=640,fit=scale-down/https://www.cumminsforum.com/attachments/1932dfeb-0302-49f0-844f-3a6743853d1b-jpeg.947674/)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=640,fit=scale-down/https://www.cumminsforum.com/attachments/f55b6d7e-b23d-443f-a123-15dcfc016e3a-jpeg.947747/)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=640,fit=scale-down/https://www.cumminsforum.com/attachments/6161082f-845d-4455-8109-8716c080171f-jpeg.947748/)
![[image]](https://www.cumminsforum.com/cdn-cgi/image/format=auto,onerror=redirect,width=640,fit=scale-down/https://www.cumminsforum.com/attachments/f8251241-9588-4ea8-b9a2-43d6e22fa560-jpeg.948392/)
Please change width=1920 to width=640, and delete height=1920 from each picture. Like I did in the quoted message. Thank you.
Bobbo and Lin
2017 F-150 XLT 4x4 SuperCab w/Max Tow Package 3.5l EcoBoost V6
2017 Airstream Flying Cloud 23FB
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StirCrazy
Kamloops, BC, Canada
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Grit dog wrote:Thanks for sharing. And not surprising. 50% fuel consumption increase giver take when towing a big sail has been the recipe forever. Nothing new.
Old Dmax and Cummins were in the 18/9 category around 70-75 mph (flat no wind). Newer Cummins is in the 14/7 range thanks to the lift, tires and too tall gears. Would be the same 18/9 if it was stock.
It does lend some credibility to those who claim 25mpg out of their big diesels. But what they forget to mention is they’re drivin miss daisy and p!ssing off the line of cars behind them who may actually have some where to be before their next birthday.
naa not driving miss daisy after I tuned my ford (emmisions on) I get 10.1 l/100km or 23.3 MPG US or 28 MPG CDN doing at 68 mph that 10kph over the speed limit here in BC and the speed limit in Alberta on that road. of course thats empty and using cruze control, I am looking forward to trying it out towing the 5th wheel and hauling the camper to see the difference there.
2014 F350 6.7 Platinum
2016 Cougar 330RBK
1991 Slumberqueen WS100
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Bionic Man
USA
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@Cummins12v98, do you really notice any difference in MPG towing tandem with that little trailer? I tow my 18’, around 3500 pound Ranger boat tandem fairly often, and I don’t notice any difference in MPG vs just one trailer.
2012 RAM 3500 Laramie Longhorn DRW CC 4x4 Max Tow, Cummins HO, 60 gallon RDS aux fuel tank, Reese 18k Elite hitch
2003 Dodge Ram 3500 QC SB 4x4 Cummins HO NV5600 with Smarty JR, Jacobs EB (sold)
2002 Gulf Stream Sea Hawk 29FRB with Honda EV6010
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Retired JSO
North Georgia Mountains
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Joined: 01/28/2009
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18 Ford F350 diesel DRW 4:30 gear, 9 towing 66-70. 14 no trailer 72-75. If you are worried about fuel mileage, you need a different hobby.
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