Length (miles) between active regens
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Super Moderator
Joined: Aug 2008
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From: Frederick, MD
Length (miles) between active regens
Today I had an active regen. First one in 1100 miles.
Now most of my miles are either towing or hauling and usually at hwy speeds of around 50-60 mph.
I thought there was a backstop of around 600 miles where it would force a regen?
What is everyone else seeing?
Not complaining that is for sure. Just interesting.
Now most of my miles are either towing or hauling and usually at hwy speeds of around 50-60 mph.
I thought there was a backstop of around 600 miles where it would force a regen?
What is everyone else seeing?
Not complaining that is for sure. Just interesting.
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From: Frederick, MD
As far as I know there were no mechanical changes to the motor or emissions items.
Only change I know for 2013 is the DRW's got a bump in towing numbers and payload due to frame change and brakes I think.
Only change I know for 2013 is the DRW's got a bump in towing numbers and payload due to frame change and brakes I think.
Fleet Owner
Joined: Mar 2012
Posts: 20,167
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From: Wisconsin
Is it possible you missed the message? I've never heard of that long and even when I'm towing the fiver on the highway I'd only get around 400 miles. Now, I'm at over 30k since my last regen 
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Joined: Sep 2006
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From: Maryland
Today I had an active regen. First one in 1100 miles.
Now most of my miles are either towing or hauling and usually at hwy speeds of around 50-60 mph.
I thought there was a backstop of around 600 miles where it would force a regen?
What is everyone else seeing?
Not complaining that is for sure. Just interesting.
Now most of my miles are either towing or hauling and usually at hwy speeds of around 50-60 mph.
I thought there was a backstop of around 600 miles where it would force a regen?
What is everyone else seeing?
Not complaining that is for sure. Just interesting.
........when you are so sure of this. This quote makes me think that you probably wouldn't believe it when I tell you the threshold that I have witnessed several times now for the forced regen based on mileage.
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Joined: Jul 2012
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With freeway driving I see 550 to 600 miles between regens regardless of soot count being well below 2.67. But with short trip, stop and go, city/suburban driving it's as if the PCM is saying "I don't believe this! DPF should be clogged by now! I think it's time for a regen!" which can occur anywhere between 180 to 330 miles, even with the soot count as low as 1.35!
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Postmaster
Joined: Sep 2006
Posts: 2,598
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From: Maryland
Careful there Matt! I've found that it varies.
With freeway driving I see 550 to 600 miles between regens regardless of soot count being well below 2.67. But with short trip, stop and go, city/suburban driving it's as if the PCM is saying "I don't believe this! DPF should be clogged by now! I think it's time for a regen!" which can occur anywhere between 180 to 330 miles, even with the soot count as low as 1.35!
With freeway driving I see 550 to 600 miles between regens regardless of soot count being well below 2.67. But with short trip, stop and go, city/suburban driving it's as if the PCM is saying "I don't believe this! DPF should be clogged by now! I think it's time for a regen!" which can occur anywhere between 180 to 330 miles, even with the soot count as low as 1.35!
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Joined: Aug 2008
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From: Frederick, MD
I am positive that I did not miss any regens. I have been really watching it as I know it should have done it before the 1100 mark.
I know the 6.4 would do the mandatory regen at about 630 miles. That was pretty set in stone.
But weird things always happened for . Even the 6.4 I had like 4 mile regens on occasion. You never hear that with a 6.4.
I know the 6.4 would do the mandatory regen at about 630 miles. That was pretty set in stone.
But weird things always happened for . Even the 6.4 I had like 4 mile regens on occasion. You never hear that with a 6.4.
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Joined: Jul 2012
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I can tell you that your findings are consistent with the majority of owners that I have gotten feedback from. I can also tell you that even with an Insight CTS and a constant watch on instant fuel economy, I have missed a regen here and there. Without the CTS I would not have known that I missed it. Look over at the CTS and all of the sudden the soot concentration was down below 1.4! It is far too easy to not know that an active regen has occurred when all you have to go by is the 3 second message on the screen and the instant MPG. As I stated above, I have the means to know when it is close to a regen and I have still missed it a few times when distracted by passengers on a long trip.
Lead Driver
Joined: Jan 2010
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Ruschejj has mentioned 700 miles on a forced regen.
On the topic of regens.
My truck had been in a regen for about 7 miles when I pulled into the driveway.
I had time so I decided to commit and let the manual regen run (I stopped it the first and only time previously).
0%, as I have discovered, is 1.00 soot GPL on my truck.
When the process stopped, EGT4 was around 1,150°F.
So I flipped on the high idle for a few minutes assuming it would drop below 1.0 but no, it was at 1.04 when I went back to the truck to put it in the garage.
Oh well.
On the topic of regens.
My truck had been in a regen for about 7 miles when I pulled into the driveway.
I had time so I decided to commit and let the manual regen run (I stopped it the first and only time previously).
0%, as I have discovered, is 1.00 soot GPL on my truck.
When the process stopped, EGT4 was around 1,150°F.
So I flipped on the high idle for a few minutes assuming it would drop below 1.0 but no, it was at 1.04 when I went back to the truck to put it in the garage.
Oh well.
Hotshot
Joined: Nov 2013
Posts: 10,107
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From: Hempstead, TX
Senix, I have seen the same you have with regards to active regen based on mileage alone. Perhaps a programing change with the 2013 and up allow us to go longer before this happens, but I just made 1,000 or so between actives. Thanks to Romeo Scorpion, I have also been using the TDR-S/FL from Amalgamated. I also find it highly unlikely that I have ever missed the message or the drop and return of the instant or tank average caused by an active regen. My truck has yet to haul anything but azz.
Hotshot
Joined: Nov 2013
Posts: 10,107
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From: Hempstead, TX
There seem to be a lot of differences in programming from the earlier years to the current ones. For instance: My superintendent has a 2011 and says that on flat roads, he maintains 0 boost and only sees boost when encountering headwinds or an incline. He says that it has been that way since day one. In his quest for the best fuel mileage, he tries his best to keep it at 0 boost. On the other hand, my truck always shows at least 5 psi boost unless going downhill, and even then, it has to be a pretty good hill before it will drop to 0.