Im lucky to get 350 On the highway I sneek up to 380-400.

 

With all due respects...
#1 BS...Gas engines don't take a crap after 100,000 miles...AND todays Diesels are extremely complicated Engines, they have a long way to go before they can be compare to and make the claims to being a 500k reliable engine like the very reliable Diesels of 5-10-20 years ago.> They were 500K engines!

#2 Not that much less...diesel fuel has been more $$$ then Premium grade gas (in my area) for years now...and that sucks! You also fail to mention, more expensive oil, very expensive filters $$$.

#5 Especially with the (new) diesels there's way more to go wrong with them and out of warranty repairs will be huge $$$ to fix...and that's (if) the tech even knows how to fix these complicated engines!

#8 You just got a boner for a "Diesel" and that's fine, as I did 20 years ago when a Diesel was infact a GREAT, SIMPLE, RELIABLE engine that ran forever with simple upkeep...and diesel fuel was much cheaper then regular grade gas not higher than Premium grade gas!

I'll add one...owning one of these newer,finicky, diesels out of warranty will be a scary, costly situation for the owner.

*Now, if you're one that can get a new Truck every couple of years...have at it.

 

I don't know, once I hit $75 my credit card quits filling and I'm too lazy to start the process over again. with about 6500 miles I think I went a total of 477 miles with the fill light coming on a few miles from the gas station.

 

Gas trucks are terrible to drive.

 

My 08 is doin great i got bout 563 outta the last tank and it varys from 17.6 to 21 on the lying machine at the top of the cab

 

There is probably a difference in software verisons on the guys getting good and the guys getting bad mileage.

 

i agree i loved getting on the highway with the 5.9 and never having to shift out of 4th OD the whole trip!. i have to say though my Ford 5.4 with the Edge on level 3 has some *****.

 

GW2,

What is your setup and do you know where yours was built? Im looking at an 08 6.7L 6-speed auto with 3.73s.

Maybe the difference in fuel mileage is due to software versions as said above, but I was trying to see if there is a significant difference in fuel mileage between the 07s and 08 but couldnt see but it seems that of the 2, the 08s seem to get better fuel mileage(from what I remember seeing before), maybe due to software kinks being worked out? Any thoughts?

 

I just got 460 (hand calculated) out of a tank. (2007 6.7 with 990 miles)

 

i say it is quite ironic- EPA,etc requiring the new diesels to be more emissions friendly.but with all the new emission crap on them, these trucks are getting significant less mpg. it solved nothing!! just making owners buy more diesel fuel-which equates to more foreign oil-because we can't drill in our own country. i would be upset if i was getting the mileage you 6.7 owners are getting- or should i say-not getting!

 

CCOOP,

You mention avoiding 6th gear when pulling to increase fuel mileage. How about when empty? Any advice on gear selections for the most fuel economy? How much of an increase in mpg have you seen following your 5th gear rule and 4th gear rule in the city? Is it more of an RPM game? Thanks for all your insight!

 

I think the environmentalists look at it as fuel is a limited resource. It will be all burned up eventually, and they don't care how much it costs to do so either. They just want to make sure that when it is burnt up that it is converted as cleanly as possible. They're not winning the battle of not getting us to burn fuel so the quicker its gone the better?

Yes, the whole concept is a bit flawed. I say burn it cleanly, efficiently, and try to make it last as long as possible. At least until another source gives us just as much fun/pleasure.

 

I have mentioned this a few times and I am not prepared to let someone explain away or rationalize the loss in mpg compared to the last version of the Cummins prior to the emissions stuff.
Today I took this a step further and finally got to talk to the head guy at Environment Canada in charge of vehicle emissions. He said using more fuel is not environmentally friendly and that says the engine is not running efficiently. When I told him what is suggested in our owners manual with regards to the regen and taking a drive to assist in clearing out the DPF...he was appalled that we are responsible for something that is clearly the responsibility of the manufacturer...and he also added that he wonders how the heck burning more fuel and time is fair to the owner and the environment. As the conversation went on he also pointed out that [in Canada] once the truck leaves the curb of the dealership, it is no longer a federal enforcement issue with emissions equipment...it would then be the job of the province it is registered in to enforce emissions rules...if there are any. There are no rules or laws pertaining to my truck in this province. He is going to be looking into a lot more. So as soon as I can find a way to get better mpg on this truck within the rules of my province...I will.
We talked about EGR and how it seems to be one of the bigger culprits on some engines when it comes to higher fuel consumption. We have an intercooler and some of what it does gets defeated by egr. correct?

I am going to be speaking with him again next week as he wants to verify what I told him about the DPF and what the owner is to do. He also made a serious point that no matter how long you own a vehicle, no matter how many miles are on it...the manufacturer is responsible for the emissions equipment, computer related codes and its operation.

Just thought I would let folks know what I heard today.

Scotty

 

Thanks Scotty, this is good stuff you're looking into... I think we all tend to agree with the head guy at EC.

 

Maybe the Dodge guys can chip in here, but my experience is as stated in the Owner's Manual - EPA crap is warranted to 60k miles only, after that, it's on me, with an estimated 120k mile service term on the DPF. ( I can't remember if that part comes from Cummins or DC.)