Forum Discussion
ShinerBock wrote:
Bionic Man wrote:
If you are regularity getting 22.7 MPG in any 6.7 diesel you are very far out of the norm. You either have a very special, almost one of a kind, truck, or you drive very conservatively.
If it is the former, I’d keep that truck for a long time. If it the latter, you would likely get 35-40 mpg in a 3.0 diesel.
I agree. Although when most people say they get ___ on the highway, they mean what their computers instant read out states as they are going down the highway and not end of tank hand calculated numbers. I can easily get this going down the highway at 70 mph on a flat surface, but that does not mean it is a true number I would tell everyone I get. I prefer quoting real world hand calculated numbers.
Besides, every vehicle I have ever owned has had the computers mileage at the end of every tank 1-3 mpg higher than what my hand calculated numbers have been. The only time it is really close is if I am on a long trip with few starts/stops, but the more I start/stop the truck the greater the difference between hand calculated and the computer mileage becomes.
Possible true on some trucks or cars but my GMC is set for 50 miles mostly and sometime 100 miles of testing. So yeah if I was set on instant for mileage okay but I for one am not.- BM, yup driven Chi town toDenver and back about ....a lot of times.
It’s downhill (overall more down than up and no I don’t actually recall any real hills, save for some overpasses) with a tail wind when you’re eastbound n down, quite often.
Chicago is the better part of a mile lower in altitude than Denver and prevailing winds are usually out of the west.
Running eastbound cross country is usually smooth sailing. Westbound is usually head winds to varying degrees. Except when Murphy gets wind of your trip and makes it a head wind both directions, lol Bionic Man wrote:
If you are regularity getting 22.7 MPG in any 6.7 diesel you are very far out of the norm. You either have a very special, almost one of a kind, truck, or you drive very conservatively.
If it is the former, I’d keep that truck for a long time. If it the latter, you would likely get 35-40 mpg in a 3.0 diesel.
I agree. Although when most people say they get ___ on the highway, they mean what their computers instant read out states as they are going down the highway and not end of tank hand calculated numbers. I can easily get this going down the highway at 70 mph on a flat surface, but that does not mean it is a true number I would tell everyone I get. I prefer quoting real world hand calculated numbers.
Besides, every vehicle I have ever owned has had the computers mileage at the end of every tank 1-3 mpg higher than what my hand calculated numbers have been. The only time it is really close is if I am on a long trip with few starts/stops, but the more I start/stop the truck the greater the difference between hand calculated and the computer mileage becomes.Bionic Man wrote:
fanrgs wrote:
Grit dog wrote:
Have you ever driven I-80 and I-76 between Chicago and Denver across Illinois, Iowa, and Nebraska? Do you really believe that it is all downhill and that there was a continuous tailwind? I used that example because it was the longest trip I have taken in that truck without towing my trailer.
fanrgs wrote:
The 6.7L Cummins in my all-steel, 3/4-ton 4x4 Ram got a calculated 23.4 MPG on a 1,000-mile all-Interstate highway trip from Denver to Chicago (not towing!).
Yeah terrific. I have 3 words for mpg claims like that. Tail-wind and downhill! Oh and you were probably slugging along in the right lane at 62.4 mph. Love these mpg claims.
But, on a shorter trip without the trailer last winter, we drove the Ram 2500 diesel on a week-long trip from Las Cruces to Big Bend NP and back on a variety of Interstate, US, and state highways, plus through the Davis Mountains and on park roads. We drove at or above the speed limit on all those roads and our average mileage for the entire round-trip was 22.7. And we certainly didn't go downhill and have a tailwind in both directions!
I track the mileage in the Ram because I have had four gas pickups, including two Fords, before this diesel and I am constantly amazed at how much better my mileage is than in any of the others.
If you are regularity getting 22.7 MPG in any 6.7 diesel you are very far out of the norm. You either have a very special, almost one of a kind, truck, or you drive very conservatively.
If it is the former, I’d keep that truck for a long time. If it the latter, you would likely get 35-40 mpg in a 3.0 diesel.
This isn't out of line, I get 22 at 78mph in my Dmax 2500. If I go to 80 or 85 it drops considerably. The dmax at 67mph pulling my rig gets between 10.5 to 12 depending on that wonderful tail wind. Going west into Texas I can get 8 or 9 sometimes with the 30mph wind in my face.Bionic Man wrote:
I don't "regularly" get 22.7 MPG. I got that mileage on 1 road trip without the trailer, just as I got 23.4 MPG on 1 all-Interstate road trip without the trailer. In town, which includes some freeway driving, I average 15-17 MPG. Towing my 5th wheel, I average 11.5-12.5 MPG, depending on the amount of Interstate on my route and number of mountain passes I have to cross.
If you are regularity getting 22.7 MPG in any 6.7 diesel you are very far out of the norm. You either have a very special, almost one of a kind, truck, or you drive very conservatively.
If it is the former, I’d keep that truck for a long time. If it the latter, you would likely get 35-40 mpg in a 3.0 diesel.
When I tow on the Interstate, I set the cruise control for 65 MPH because that's what my trailer tires are rated at. Those are OEM tires with 26,000 miles on them and I have never had a flat or blowout on this trailer. When I am not towing, I set the cruise control for whatever the speed limit is on the Interstate because because my last speeding ticket cost me $370 plus a court appearance. And I don't like going to court!fanrgs wrote:
Grit dog wrote:
Have you ever driven I-80 and I-76 between Chicago and Denver across Illinois, Iowa, and Nebraska? Do you really believe that it is all downhill and that there was a continuous tailwind? I used that example because it was the longest trip I have taken in that truck without towing my trailer.
fanrgs wrote:
The 6.7L Cummins in my all-steel, 3/4-ton 4x4 Ram got a calculated 23.4 MPG on a 1,000-mile all-Interstate highway trip from Denver to Chicago (not towing!).
Yeah terrific. I have 3 words for mpg claims like that. Tail-wind and downhill! Oh and you were probably slugging along in the right lane at 62.4 mph. Love these mpg claims.
But, on a shorter trip without the trailer last winter, we drove the Ram 2500 diesel on a week-long trip from Las Cruces to Big Bend NP and back on a variety of Interstate, US, and state highways, plus through the Davis Mountains and on park roads. We drove at or above the speed limit on all those roads and our average mileage for the entire round-trip was 22.7. And we certainly didn't go downhill and have a tailwind in both directions!
I track the mileage in the Ram because I have had four gas pickups, including two Fords, before this diesel and I am constantly amazed at how much better my mileage is than in any of the others.
If you are regularity getting 22.7 MPG in any 6.7 diesel you are very far out of the norm. You either have a very special, almost one of a kind, truck, or you drive very conservatively.
If it is the former, I’d keep that truck for a long time. If it the latter, you would likely get 35-40 mpg in a 3.0 diesel.- My Ecoboost at 60 mph on a level , in 6th gear is turning about 17-1800 rpms.
fanrgs wrote:
Oh, one other diesel advantage--it's quiet at highway speeds. A quiet diesel? Impossible, you say! What RPM does your tach show when you are towing your trailer at 60 MPH on a level Interstate? Mine shows 1,400 RPM. ib516 wrote:
FishOnOne wrote:
kw/00 wrote:
With that much power and a potential payload of 2020 lbs, it may not be that bad of a truck. Its impressive to see a 3.0 diesel hitting those figures. I am curious what the new GM diesel numbers will be....
Expect GM's to be best in class HP and Torque
I don't know about that...
They will fight the same issue Ram does....inline 6s aren't high HP producers when compared to the V6/V8 cousins. Torque, yes, hp, no.
Aaaa no.
Here is an inline that makes some power. This is a truck I used to race against and it makes some power. An old 12V that puts down about 1,000 HP +. I don't want to hear apple, orange, race truck BS. It has the same bore/stroke ratio that an old tractor engine has.
Inline, V, pancake, radial or whatever; you want to make HP you can make HP.Terryallan wrote:
Hammerboy wrote:
Hybridhunter wrote:
How are some people comparing features in a truck worth up to $8K, to a much less powerful, much slower, MUCH more expensive engine? I buy fairly basic trucks, and wouldn't spend more for a platinum, but if I did, it's tangible. The diesel is donkey economics with laughable power levels, unproven reliability, and expensive maintenance; not much upside there to ponder. On second thought, distronic cruise control and fan cooled seats seem like a steal!
I'm a business owner who can buy what I want, for my work vehicle, or for my wife for here winter rig (she daily drives my modded F150), and the diesel just doesn't fit any rational financial thinking. Not even close.
Oh, and our company owns 3 diesels, none of which present any clear balance sheet advantages whatsoever.
I did not buy buy diesel truck because it gets better fuel mileage. I bought it because it's simply a truck that's superior at pulling. There's a reason why people spend the money on them. It's not just dollars and cents.
Dan
However in the case of the little Ford diesel. The gas truck will out pull it. The Diesel has LESS HP, and LESS torque, and LESS towing capacity than the V6 EcoBoost.
I agree. It never made sense to me with the small half ton diesels. 3/4 ton on up yes there's an advantage. If I were in the market for a half ton EcoBoost it would be
Danib516 wrote:
FishOnOne wrote:
kw/00 wrote:
With that much power and a potential payload of 2020 lbs, it may not be that bad of a truck. Its impressive to see a 3.0 diesel hitting those figures. I am curious what the new GM diesel numbers will be....
Expect GM's to be best in class HP and Torque
I don't know about that...
They will fight the same issue Ram does....inline 6s aren't high HP producers when compared to the V6/V8 cousins. Torque, yes, hp, no.
Tell that to GM's engineers because they're the one's making that claim.
