2012 Mileage thus far SRW 3500 Crew Cab 4x4

[ddivinia]

I had read some posts that said you have to be in tow mode to turn on the EB.

I don't have enough seat time in the truck yet,
D.

 

[crispyboy]

Once a week take that thing on the HWY and floor it a couple of times.

Why do you have to "floor it"? This makes no sense to me. People on the internet said the same thing about a VW diesel I once owned. The only reason I ever needed to "floor it" was to merge with traffic. I have never had to floor our farm tractor either... ...



My dealership told me to run the EB fairly often. I shoot for at least 50% of the time when running empty. As far as I know the EB and tow/haul modes are independent.

 

[HBarlow]

There is NO need to "floor it. " That's just internet nonsense.

 

[DFranks]

There is NO need to "floor it. " That's just internet nonsense.

Whatever, I take it you are an expert at nonsense, thanks for following up your response as to why it's nonsense



If all you do is stop and go drive with alot of idling, which is better? It's definately not as good as towing at grade. But, the idea is to get it out on the hwy, and work the engine a bit a couple times a month.

Will it help? it won't hurt and it's certainly better than his current habit, as a commuter and grocery getter.





I have 5000miles on my 2012 without regeneration and without an oil change. So go figure... .





Plus as a bonus you can hear that $6000. engine option work, and be reminded as to why you paid for that upgrade.

 

[AH64ID]

I have 5000miles on my 2012 without regeneration and without an oil change. So go figure... .

How do you figure you haven't had a regeneration?

And 5000 miles on a new motor without an oil change just seems dumb to me.

 

[AEdelheit]

Neither does the 2011. The EB and tow/haul are two separate functions, each with its own button, that can be engaged independently.



Rusty

There independent but from the few ive driven and people ive talked too it works better in tow haul mode because of the transmission calibrations, more aggressive downshifts and holds a gear longer

 

[HBarlow]

I was once able to discuss the ISB6. 7 with a Cummins engineer by phone not long after I bought my '08. I had sent in an email question on something related to regen.

He told me the trucks will regen normally and do everything they are supposed to do by simply driving on the highway at normal speed. He also explained that new software which had been recently introduced at that time and was also being uploaded into existing trucks at the time would allow the truck ECMs to increase idle speed and perform a revised regen at "idle. "

I don't remember the details any longer but posted the info received from him at the time. The new program was part of the new Net Zero software features.

Nobody cares if someone else wants to start off from every stop light with their foot to the floor or use full power to accelerate every day. My point is it is not necessary for normal regeneration.

 

[AH64ID]

It is not necessary for active regeneration, but the added EGT's from heavy driving will allow for more passive generation. The issue is that unless your always at GCWR up a hill you don't sustain enough EGT's for passive generation to take the place of active.

 

[Ben S]

Ok, been driving around with the Exhaust brake on most of the time (90%) and no change in around town mileage... 15. 5 mpg as hand calculated. The computer is fairly close at 15. 3 mpg.

I do not care for driving the truck around with the tow haul feature on as the truck is not as smooth IMO.

 

[AWeiman]

here is the link to the thread harvey posted about his chat with a cummins engineer. should answer all questions.

https://www.turbodieselregister.com...ds-idling-acceptable-says-dodge-engineer.html

 

[DFranks]

How do you figure you haven't had a regeneration?



And 5000 miles on a new motor without an oil change just seems dumb to me.

I would surmise to say that I have had passive regeneration.



When the light tells me to change my oil, I will. Untill then... . I will also pull an oil sample for Blackstone.

 

[HBarlow]

A couple of posts here suggest the owner believes use of exhaust brake and fuel mileage are related. They are not.

Use of the exhaust brake has no effect whatsoever on fuel consumption. When the eb is open which is anytime the right pedal is pressed, its not doing anything. When the right foot is lifted, the exhaust brake closes and begins braking.

Tow/Haul mode has never been required for exhaust brake use, they are independent of each other, but in the Tow/Haul mode ecm/pcm programming is more aggressive and the transmission downshifts. The eb is used more aggressively in Tow/Haul mode.

 

[AH64ID]

I would surmise to say that I have had passive regeneration.



When the light tells me to change my oil, I will. Untill then... . I will also pull an oil sample for Blackstone.

You still haven't told us how you know you haven't had a regen. The truck will not tell you under normal circumstances.



If you talk to people that own them, are honest, and know what is going on they will tell you that a regen happens on average every 150 miles, towing or not.



For passive regen to be effective you have to hold EGT's above 1250° for prolonged period of times.





Pull your dipstick and feel it, the first oil in these motors is NASTY! Not one good reason to keep it in there until the light comes on.

 

[Bob4x4]

You still haven't told us how you know you haven't had a regen. The truck will not tell you under normal circumstances.



If you talk to people that own them, are honest, and know what is going on they will tell you that a regen happens on average every 150 miles, towing or not.



For passive regen to be effective you have to hold EGT's above 1250° for prolonged period of times.





Pull your dipstick and feel it, the first oil in these motors is NASTY! Not one good reason to keep it in there until the light comes on.

driving a 6. 7 with a scanner you will see regens above 50 mph and egts(factory sensors) much lower than 1250. The scanner also has the predicted time in seconds for the regen

 

[crispyboy]

The only time I can tell my truck has gone through regeneration is when I shut it off and you can hear the exhaust ticking from being so hot and the fuel mileage on the EVIC suddenly starts going down an MPG when driving. Other than that it is a seamless operation.

 

[DFranks]

You still haven't told us how you know you haven't had a regen. The truck will not tell you under normal circumstances.



If you talk to people that own them, are honest, and know what is going on they will tell you that a regen happens on average every 150 miles, towing or not.



For passive regen to be effective you have to hold EGT's above 1250° for prolonged period of times.





Pull your dipstick and feel it, the first oil in these motors is NASTY! Not one good reason to keep it in there until the light comes on.

I leaned something new, I was under the impression that I would either get a light on the dash, or ( at the very least ) be able to smell the regeneration.



My apologies, for my ignorance.



I am planning on changing my oil after our long weekend. I'll be running the mopar stuff for one more change. Then I'll be switching to Amsoil.

 

[RustyJC]

I'll be running the mopar stuff for one more change. Then I'll be switching to Amsoil.

Your money and your choice, but IMHO you won't be able to take advantage of the extended life of synthetics with these trucks. Oil change intervals are a function of sooting (EGR) and fuel dilution (regeneration cycles) of the lube oil. I just run a good dino oil and keep it and the oil filter changed regularly.



Rusty

 

[AH64ID]

driving a 6. 7 with a scanner you will see regens above 50 mph and egts(factory sensors) much lower than 1250. The scanner also has the predicted time in seconds for the regen

Yeah, IIRC some of the OBDII gauges will show you as well.

I leaned something new, I was under the impression that I would either get a light on the dash, or ( at the very least ) be able to smell the regeneration.



My apologies, for my ignorance.



I am planning on changing my oil after our long weekend. I'll be running the mopar stuff for one more change. Then I'll be switching to Amsoil.

I would look at the Amsoil OE oil. Great oil, but more cost effective for the shorter life span of the oil in a 6. 7.

 

[DFranks]

Concerning Amsoil, you may be right about the shorter life span and being less cost effective.

We get some cold cold mornings up here in Canada, and being on jobsites, sometimes I can plug the block heater in while at work and sometimes I can't depending on location.



That is primarily my reason for going to synthetic, unless I can find a dino that flows decently in the minus temps... .

 

[Ben S]

Did another long trip unloaded 5 hours one way and 5 hours back range of speeds between brief periods at 35 mph up to brief periods at 70 mph. Most of the time ran between 45 and 55 mph. Got an overall trip total of 19. 4 mpg. Averaging about 15. 3 mpg around town in the summer unloaded. Got about 7000 mi on truck now.

Have left exhaust brake on all the time since last oil change and I will report when my next oil change is due by computer.