Blue-Tec Discussion

[DieselLady]

While I admit I kinda like not seeing the black cloud spewing from my truck, the impact to the pocket book in lost fuel economy and the potential for trouble with a plugged DPF concerns me. I'm considering putting in a delete kit and wondered if -

That would eliminate the concern about ULSD? Until the ULSD is universal, not having to worry about the grade would be nice.

W/O the DPF would the need for CJ-4 oil be eliminated? My understanding is that CJ-4 is great for the DPF, not so great for the engine!!

h

Both ULSD and CJ-4 rated oil are designed to lower the ash content for the life of the DPF. With that being gone, there is no need for either.
While your at it, Block the EGR. This is where you will see more savings in fuel economy.

 

[hwebster]

Good Points

I took a look at the process for removing the EGR on the Cummins forum. Seems pretty straight forward. Will have to try that shortly!!



Thanks!!



H

 

[Jim W]

Item 3 is some what misleading. Yes, you will burn fuel too clean the DPF but only if the exhaust is not hot enough. The exhaust temp needs to be above 1200 F then the "Regen" cycle will be passive. By this the hot exhaust will burn off the accumulate soot in the DPF. If the exhaust temp is not above 1200F then the unit will go into active cycle and then that cycle will add fuel to accomplish the burning of the soot in the DPF. This is why some dealers tell you to take the truck out and run the truck at highway speeds. This will heat the exhaust up to obtain passive regen. I believe this was reported in "TDR" site could not locate the article. Maybe one of the monitors can find this and post this for all to read. One more thing for everyone to remember: HP will burn fuel. I believe a stock 6. 7L is rated for 350 HP and is a 408 cu in size engine. Plus the emission gear that is on this engine it will burn more fuel.

Love my truck every minute that I drive the truck.

 

[hwebster]

Well I get about 1 hour of high speed high way driving a day. I haven't got my EGT probe in yet so I can't verify the EGT. I have done about 16 regens over 6000 miles. I can't distinguish the passive from the active ones tho.

The Rgen filter value I see on my edge Insight is gradually creeping up, now about 23%. I would expect that value to drop after a regen?? but have yet to see it drop...
H

 

[csavard]

OK, I find myself in agreement with Paul.

The resulting particulate and gasses produced by burning the extra amount of fuel each year does not make sense. Now add in the more frequent oil changes required by this DPF & EGR system and you have a loose-loose situation. My 'reminder message' comes on every 2500KM (I am in Canada Eh). This means I have to have 5 oil changes in the time that I used to change it once (12000 Km).

At around $100 per oil change this adds up and my new truck is producing 5 times the waste oil of a truck without the DPF.



Lets look at the millage in a little more detail now:

As Paul said:



Originally Posted by PaulBarker

the fact is you are still burning something,



what is better,



1)a 2007 5. 9 that gets 20mpg and has a cat



or



2)2 2007. 5 6. 7 that gets 12mpg and burns the collected carbon with raw diesel and not to mention the diesel that collects in our engine.



Now what fumes are you producing with that method?

What is better over 5yrs.



1) "mega cab 3/4 ton auto"In my 6. 7. i average 12 mpg when i figure it on paper. I drive about 50k miles a yr. over 5yrs that is 250k miles. with a 35gal tank and getting 12mpg that equals to 20,833 gals of diesel burned



2)my 2004. 5 "1 ton QC dually 4x4" i averaged 18mpg on that truck, so 250k miles in 5yrs equals 13,888 gals diesel burned



BEGIN RANT:



This equates to 6945 gallons per year of extra diesel burned by the DPF equipped truck. Converting this to liters (Canada again 'eh) we get 26289 liters burned @ $1. 15 per liter = $30232 PER YEAR.



I will concede that 50K per year is quite a lot of driving but burning all this extra fuel will be bad for the environment regardless the amount reduced to ash before exiting the tailpipe. And what about the cost of extracting, processing and delivering the extra 6945 Gallons of fuel per year ? Also don't forget to add in using 5X the amount of crankcase oil.



In my book the only winners are the oil companies and Chrysler. For about $2500. 00 (BADP delete & EGR block-off) I can reduce my fuel consumption, oil consumption and trips to the dealer. by more than half. This saves me money and saves the environment. Chrysler will never get the millage up with these trucks as long as the exhaust is restricted with a DPF. Lets leave the CAT for another day... .



Diesels are Diesels !! NOT GAS ENGINES !

Diesel cannot be held to the same emission standards as refined fuel like gas. The particulate from the refining process for gas is burned off at the refinery during processing so gas burners can feel good about saving the environment.



Isn't it time the refineries and oil companies took some responsibilities instead if dumping this crap situation on the pocketbooks of Jack & Jill diesel truck owners?



This is a no-brainer



END RANT.



Cheers,



Chris.

P. S. Please feel free to correct me if my numbers are off anywhere, I did double check them.

 

[DieselLady]

So lets give you something else to think about. If my EGTs are running at 1200* that would be like towing my trailer up a steep hill sustained in my 99 dodge. I know that i don't run 1200* EGTs running empty down the highway, so I doubt my DPF would get much hotter than say 300* or so? Just a guess actually. So even in Passive regen, I am quite sure it will be dumping raw fuel into the exhaust. This is just ridiculous if you ask me.

P. S. My truck,,, DPF less, Cat less, and EGR less. Runs much cooler and gained 3 mpg. Not bad for a truck with 4 wheel drive and 35 " tires. Oo.

 

[grasmo]

If its loud,stinks or smokes I gotta have it. Oh she's married. LOL!!! Thats pretty good.

 

[hwebster]

35" tires... Have you got an escalator installed ;-)

 

[DieselLady]

35" tires... Have you got an escalator installed ;-)

AMP steps. Kind of like an escalator!!!:-laf

 

[tom sweeney]

..... 408. 859 cubic inches... . much closer to 409... eh???... . tom

 

[tom sweeney]

DSLLADY... . what kind of fuel mileage are you getting now???..... sounds interesting..... tom

 

[hwebster]

She's Real Fine... . MY 4... 0... 9... ;-0

 

[DieselLady]

Milage has gone from 13. 5 hwy, to avg 16. Around town from 10. 5 to 13. I am surprised that I haven't gotten more out of it, but I am sure that the 5 injection events play a big part in it. When someone comes up with a way to stop some of these, it should improve greatly. Also the standard trans trucks are seeing much better economy than the autos. A good torque converter that gets the power to the ground will most likely help a lot too. All these little things are sure to add up to a considerable increase in economy.

 

[NStates]

BlueTec Technology

I do not find a significant drop in overall fuel mileage. Possibly one mile per gallon. I do like the fact that when I tow my fifth wheel there is no black soot on the side of the rig. My old rig had the paint ruined in four years just from cleaning and waxing. Also the soot will penetrate any areas where there is an air leak and create stains. I can pick up that extra mile per gallon by driving a little different.



Norm



2008 Dodge RAM 3500 Laramie Quad Cab 4X2



6. 7 Liter Cummins (R) Turbo Diesel Engine, 6 -Speed Automatic 68RFE Transmission, 3. 73 Anti-Spin Differential, Brilliant White, ISSPRO Gauges, Transfer Flow Fuel Tank, PullRite #20,500 Super 5th Hitch, Line-X, XTRA Bed liner , Hayes Genesis brake controller, PML Deep Transmission Pan, Custom Graphics, Pull a Mobile Suites Fifth Wheel.