I have the worst setup for mileage. Big heavy camper, plus trailer, plus 4.10 gears on a heavy loaded up truck. I plan on 10MPG for camping trips. So I get excited when I actually hit 11mpg sometimes. And I drive with the camper on very close to the speed limit on the interstate.
2011 Dodge Ram 3500 4*4 Black dually Laramie 4.10 gears
2011 Arctic Fox 1150 Drybath
2009 Polaris RZR w/fun parts
2011 Polaris Sportsman 550 XP EPS w/stuff
2006 Polaris Sportsman 500 w/stuff
1977 K5 Blazer 1 ton modified
2007 Toyota Camry Hybrid (her car)
Ford F350 SRW 4x4 4.3 rear 6.2 gas engine. Lance 981. mpty truck :14.5 to 15.5mpg
With camper fully loaded with water and stuff 10.5
Both are @ 60mpg highway , flat ,no significant wind.
Camper weighs more than 4K
Diesel in my neck of the woods averages .40 per gallon over reg gas. Truck as gasser 8K less than the 6.7 diesel.
2003 Dodge w/Cummins engine, auto trans, AF990s. We just made a 650mile trip through central Oregon mountains with just the camper. Got just shy of 14mpg. I do not drive conservatively.
We just drove from MI to Gulf Shores, AL. We then wandered to Pensacola, St. George Is., Carrabelle, and up through Knoxville, TN and back home. Trip down at 65 on CC. Trip home at 70+, also largely on cruise.
Gross weight: 12,500 lbs. Total miles driven, 3145. Calculated m.p.g., 12.2.
The Big Dog.
2003 Chev ECLB DRW Duramax LB7
2003 Lance 1121
My idea of roughing it is single ply toilet paper.
AITG wrote: We just drove from MI to Gulf Shores, AL. We then wandered to Pensacola, St. George Is., Carrabelle, and up through Knoxville, TN and back home. Trip down at 65 on CC. Trip home at 70+, also largely on cruise.
Gross weight: 12,500 lbs. Total miles driven, 3145. Calculated m.p.g., 12.2.
Quote: To make that statement a fair comparison, you'd have to load up to around 13,500lbs AND push the height up to about 12 1/2 feet tall. THEN we'll see what that gasser gets for MPG.
Boaty: With all that on the Vortec 6 gaser, we'd probably be getting 6~8 MPG
The problem with big diesels is: 12 MPG is terrible! Whether be a gasoline engine or a diesel, there really is no way to get better than about 12 MPG (scatter plot with majority in this range hauling big with a few statistical outliers, I'll bet!); and according to several diesel owners, even 10~11 MPG hauling big is the norm.
Unfortunately, whether you have an diesel MDT, 1 ton or Class 8 tractor, MPG suffers greatly when you get beyond a certain threshold. The sweet spot with our Vortec 6 gasoline drinker doing 13+ MPG is: approximately 1700-LBS hauling & pulling a small low-profile aerodynamically-shaped trailer. Anything more than that, the fuel/mileage plummets precipitously.
Where diesels shine is when hauling at high altitudes, and in mountainous terrain: the benefits being primarily steady velocity, and lesser: fuel economy (a non turbocharged gas engine under the same conditions would suffer greatly).
Our driving is made up primarily (85%) of East coast flatlands, with a payload not exceeding about 1500~1600 LBS (no towing).
mooring product wrote: 70 mph is my sweat spot with set up. My GT4088 turbo is making 15lbs of boost and EGTs are around 900 degrees.
I averaged about 13 mpg headed to my destination. Sadly with a severe head wind comping home I averaged about 9 mpg at 60mph.
My thinking when I had diesel trucks (6 different ones and all 3 brands + 1 Volvo class 7 converted from class 8 RV puller) were the closer I ran to 0# of boost (without lugging engine) the better my mileage was. More boost more fuel to accomplish work. If I slowed down my boost went down and mileage went up. Also I found less boost lower EGT at least that is the way it seemed to work on my diesels.
This is IMO
Butch
2011 F350 KR 4X4 CC LB SRW
2012 Northern Lite 10 2 CDSE
2010 Can-Am 650XT Outlander Max
2012 Harley Tri Glide
Offline
