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Comments
Then too suppose ULSD is less dense than dirty LSD diesel. If it gave the same miles/lb of fuel, then it would give a lower mi/gal.
Gasoline and diesel give the same energy per unit weight but diesel is 18% higher in density (0.85 kg/L vs. 0.72 kg/L)and most of the higher mpg of diesel engines is due to the higher density of diesel fuel. Diesel engines are of course somewhat more efficient/lb, but the main factor is higher density of the fuel.
Diesel engines are more efficient than gassers because they have far fewer pumping losses, work at much higher compression ratios, are lean burn engines and are thermally more efficient to boot.
Now getting to the lower FE with ULSD, it just does not make sense. Besides being much lower in sulfur content, the refining process to remove the sulfur also removes some of the aromatic compounds, which contribute some energy to the fuel but also contribute to particulates and the formation of PAH compounds, known carcinogens. I drive a Jeep Liberty CRD and I have had no loss in FE or performance and have been using ULSD since October 2006. The only noticeable difference is less smoke under load and I hardly had any of that to begin with. All diesels can run efficiently on ULSD with no loss in FE. The problem must lie else where.
But often the diesel option is a lower hp than the gasoline one. This confers and additional fuel economy advantage.
kcram - Pickups Host
I have hired a lawyer to try and get my money back from them (Ford)...I have 600Miles on it, and I am furious...it is truly insane...that means with your fith-wheel, you will need to fuel up everu 100 - 150Miles...
My 06 Chev diesel gets the same mileage.
I felt this was unethical and wondered if the dealer was getting some type of kickback. That aside, I called Ford motor direct and logged a complaint. They rep at Ford said the dealer had no right to direct me to a particular fueling station. She put me on hold and called the dealer right then and there. The dealer scheduled an appointment with me and took care of the problem.
I would recommend calling Ford directly (got the number off of their website) and issuing a complaint. I think these dealers are scamming people, and consumers need to call B.S. on them.
Hope that helps.
p.s. the truck has around 22,000 miles on it.
another possibility is to maybe trade the F450 for a used kenworth - with all those gears it might actually get better mpg than the F450. a computer-geek coworker of mine actually bought a kenworth for towing his track-cars. now *that's* a real driver there, i don't care who you are, git 'r done.
on the way to work one morning i met a local dude getting coffee too. he was driving a recent diesel GM pickup and had left it running in the parking lot. i commented "nice truck, i'm going to go steal it now since you left it running". but it was running via 'valet key' and he had locked it remotely. awww!
then he saw my GTO and we talked for a while over coffee - i think he's the president of local BMWCCA chapter, which he invited me to join. he uses his GM pickup to tow his "track car, a modded M3". later as he accelerated onto the highway i was quite impressed by his pickup's pickup! and soot!
(this was before ULSD, so his exhaust was sootier than it would be today.)
This irritates some mostly young men and when they do pass some of them really lay into the fuel in their diesel pickups, and pour out a cloud of soot right into the cyclists face.
I have tried the triple pup and almost killed my torque convertor. Every person I have talked to have said the triple pup is hard on tranny's.
What do you people recommend as far as programmers and chips go?
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Benjamin Jones
Ecomodder.com - Helping you increase your fuel economy
On the other hand, I have a 2006 Dodge Ram Megacab 2500 4x4 that is getting me 22 mpg on my daily commute to/from work.
Chris
Changing to 20" wheels could possibly make a difference in true mpg when the vehicle was lightly loaded if the new tires had a higher overall diameter at the tread, but the odometer and speedometer would read lower than the true value unless you recalibrated to the new wheel diameter. Did you?
If the K&N cold air intake had some features that could possibly make a significant difference compared to the stock setup, don't you think Chrysler would have incorporated these features into their design? By modifying the air induction you may have caused the intake sensors to cause the ECM to add more fuel than in the stock set-up.
Taking out the catalytic converter to reduce exhaust backpressure could also mess up the engine controls. Isn't there feedback to the ECM from sensors having to do with the catalytic converter? Not to mention that it is illegal to remove the catalytic converter.
Experimental studies (including one on the TV show Mythbusters) have shown that an empty pickup bed with the tailgate up has less aerodynamic resistance than with the tailgate down or removed, or with a tonneau cover. However, a tonneau cover will at least keep your stuff from blowing away and from getting rained on.
Go back to stock and forget about the chips.