Truck exercise run. Have not used the truck too much lately, and remembered the exhaust fluid percentage was showing 90% at the end of my last outing. So today after running errands and putting on about 30 miles, the exhaust fluid percentage moved up to 95%. I am close to a tollway and IH35 so decided to make a 63 mile round trip on the expressways.

It's easy to stay in the 70+ MPH range and it was a great sunny day in the 61 degree temperature range. After running 20 miles a regen started, I used my cell phone to capture the progress of the regen. I have the screen that shows Exhaust Filter Percentage. Driving on the expressway started at 17389.0 at the 95%,

17409.2 Exhaust Filter: Full 12:49 PM
17415.3 Exhaust Filter: 85% 12:54 PM
17419.2 Exhaust Filter: 70% 12:57 PM
17422.6 Exhaust Filter: 55% 1:01 PM
17425.4 Exhaust Filter: 45% 1:03 PM
17429.1 Exhaust Filter: 35% 1:07 PM
17430.4 Exhaust Filter: 30% 1:08 PM
17436.8 Exhaust Filter: 25% 1:14 PM
17452.1 Exhaust Filter: 25% 1.33 PM Home

There was always a short lapse between seeing the percentage change and getting the cell phone in position to shoot a picture. Perhaps plus or minus 10 to 15 seconds.

I have had truck since end of January of 2015, so have been through this many times. This was perhaps the first time where everything happened in a convenient way for me to try and document. One additional thought: when it is happening I always feel like its taking forever to finish a regen. This one basically took from around 12:49 PM to 1:14 PM. I did not have my notebook and Torque Pro with me today.

Thought some of the newer users to our trucks might be interested.

 

Generally the regen takes about 20 miles.....give or take a few miles. Once regen finishes, the soot level may continue to drop as the DPF cools off.

 

Sounds about typical. Here is what one looks like, recorded and plotted (some freeway and some city). Minutes along the x axis. I have lately been testing the assertion that downshifting to 5th to keep the RPM up during regen makes it happen a little faster, my first impression is that it does.

 

I have had them as short as 4 miles or as long as 15 miles.


I have also gone upwards of 2K towing with no regens.

 

The regens on my 2012 truck takes 10 miles at highway speeds to complete.

 

Normal regen take about 10 miles on the my 2012 also. At 20 miles it would be a pain in the A$$. Is 20 miles common in the newer trucks?


I do get a long regen about every 600 to 1000 miles.

 

My regens, when I watch with Torque Pro, always seem about the same as this regen that I documented. When I saw it go to 25% at 17436.8 - 1:14 PM, perhaps the regen could have finished earlier and then the soot level was still going lower. If so then the time I recorded was the adjusted soot level and not the actual turning off of the regen. Then the time shown, is essentially time started to time lowest soot level reached. I have never documented a regen in 5th gear, so cannot address whether it would be quicker. A few minutes one way or another is perhaps not too important, but knowing generally that the regen could take approximately this much time, can perhaps help with any planning we might want to do.

 

I have tried the 5th gear regens and noticed no improvement in time nor distance on my 2015. I will leave it in 6th gear in the future.

 

My truck is a '16. I'm at about 13K miles and my standard regen has always been 20 miles. I usually feel the change in cadence and within 10-15 seconds I'll see the "cleaning exhaust" message (I have an XL). If I can I fire up the FORScan on my phone to watch the show. 20 miles and I go from Active to Off. I have noticed when I do a partial regen, like when one starts just a few miles from home, that on the next use the DPF load numbers continue to fall for several miles even though a regen is not in progress.

 

I only have 1,000 miles on '17 but I haven't seen anything on the screen notifying me that a regen was in progress. My DEF gauge is no longer showing full. There have been a couple times that the truck got really stinky. Is that indicative of a regen?

 

The '17s no longer give the notification that a regen is in progress. A really stinky truck can be a sign as the DPF is getting really hot for the first time.

 

i'd say it was in regen.


The '17's can have the dpf % screen enabled through IDS.

 

One of these days I'm going to have to do that. I like to know what's going on. Too much information is a good problem.

 

I miss the quick regens on my 13. My 15 takes 20+ miles to complete which means it doesnt always finish so I get into a cycle of partial regens. I live in a rural area with a 20 mile drive to work and the 13 would always complete the regen in between drives.

 

Are you sure?