my 2008 has been for the last 6-8months running the regen almost once a tank, i know this because it does this when the fuel guage is below 1/4 and i'm starting to look for a fill-up. Doesn't seem to matter if it's all hwy driving or around town.
A trip to the dealer for the 35k punch list and i mentioned this to the service people. Once a tank is not what i was sold.
While waiting i walked through the 2010 lot and a salesman came out and i we talked about the 2010 dmax and he said the regen was every 8-10kmiles.
I laughed.
Then back to the service dept and they said there were no codes that came up so the DPF was working to specs.
But every tank seems still to be excesive.

You?

Mine is about once a tank as well, driving about half city half highway.

Yes, they all regen about every 300-400 miles - or about once a tankful. I have had the same problem as you with mine starting a regen when it is low on fuel, and almost ran out as a result. You would have thought some engineer would have programed it not to start a regen when the low fuel light is on...:rolleyes:

I filled mine up, then refilled it again when it got to be about 1/2 full, then again. That seems to have moved to regen "schedule" up to closer to a full tank.

That's laughable that the salesman told you every 8-10 thousand mile. Just shows they generally know nothing about what they sell.

Mine goes into regen anywhere between 180 and 300 miles. I took it to the dealer for that some time ago and they told me that regen can happen at any time based on what your driving conditions are. They showed me a printout of all the regens that my truck went through and the odometer mileage that it happened. Since most of my driving is done with either a camper loaded or towing a trailer or both, my truck goes into regen more often than an empty truck.

my 2008 has been for the last 6-8months running the regen almost once a tank, i know this because it does this when the fuel guage is below 1/4 and i'm starting to look for a fill-up. Doesn't seem to matter if it's all hwy driving or around town.
A trip to the dealer for the 35k punch list and i mentioned this to the service people. Once a tank is not what i was sold.
While waiting i walked through the 2010 lot and a salesman came out and i we talked about the 2010 dmax and he said the regen was every 8-10kmiles.
I laughed.
Then back to the service dept and they said there were no codes that came up so the DPF was working to specs.
But every tank seems still to be excesive.

You?
all mine do it at least once a tank.

Mine regenerates once a tank to, It seams like it regenerates on a cycle ,and not when its called for.( regenerates at the same point, regardless of driving city/highway)

Every 410 miles on the average per my DashHawk. Does not matter towing or not - same average - just have more grams of soot to burn off when towing.

;)

Yes the regens occur every tankfull, I find they are of shorter duration when towing because you are already in the regen temp range occasionally and yes the salesman was right, there are some magazine articles that say the LML will regen at 7-8K saving fuel and will use the urea for Nox reduction.

Here is my regen history:

Regen

9409 12/1/08
9659 12/16/08
9917 1/13/09
10148 1/28/09 15G
10405 2/8/09 21G
10762 2/23/09
11042 3/2/09
11345 4/3/09
11723 4/26/09
12159 5/13/09
12575 5/16/09
12905 5/21/09
13275 6/7/09
14661 9/20/09
15503 10/14/09
15918 10/17/09
16331 10/17/09
16505 10/17/09
16743 10/17/09
17087 11/14/09
17337 12/9/09
17635 12/20/09

I may have missed one here or there and I quit tracking it as of the new year. I hope this helps.

Mine does it about every 2nd -3rd tank, not every tank. I'm not sure, but I have seen and heard (online) where the Banks actually burns cleaner than the stock tune, so I'm wondering if maybe that's why I go into regen less often than once a tank? My buddy's LMM also equipped with the Banks, goes into regen even less often than mine. I'm at 5500 miles and he's at 100,000. I'm a 2010 and he's a 2007.5 both equipped the same way.

How many soot grams before a Regen? I just installed a Edge race programmer over a month ago and have not seen it come up on the screen yet. it has been sitting 10

Did you read the previous posts in this thread? I posted a bunch of regens with a couple of soot numbers. The two posted were 15G and 21G. How many miles did you drive? A "month" doesn't tell us anything as you could travel 10 miles or 10,000 in a month.

about 4,000 miles???

Oddly enough, I just did a 1500-mile (3500 LB) pull from Quebec to Daytona Beach FL, and regens went to NONE over 7 tanks, from 1 every 2 tanks during normal use. I'm guessing that's as a result of 100% highway driving @ 80MPH. I guess I'll see what happens when I return to my normal everyday driving next week when I return.

about 4,000 miles???

Something is wrong. You should regen about once per tank at perhaps 15-20G.

Oddly enough, I just did a 1500-mile (3500 LB) pull from Quebec to Daytona Beach FL, and regens went to NONE over 7 tanks, from 1 every 2 tanks during normal use. I'm guessing that's as a result of 100% highway driving @ 80MPH. I guess I'll see what happens when I return to my normal everyday driving next week when I return.

Weird. I just pulled a 22' trailer fullo Harleys to Daytona and my regens did drop a bit, but I still had them every 2-3 tanks. I might have missed them as my new Edge CTS Juice doesn't have a regen alarm like the old one did.

It's OK I plan to ditch the DPF and CAT soon. But thats funny it hasn't moved off 10 for that long and no call for Regen yet. I thought about doing a manual Regen just to see how fast it builds back up.

Mine does it every 400 miles give or take 10 to 15 miles.I get prettty fair mileage 18 to 20 highway, then comes regen every tank and down to 15 to 16 mpg. Woould be nice if you could have more control of the regen,because it does waste quite a bit of fuel at $3.oo plus per gallon.

My truck regens maybe once every three tanks. I am running my PPE Hot+2 on level 6, which probably runs more efficiently and cleaner than the stock tune. I'm also able to get 400 or more miles out of a tank of fuel.

my 2008 has been for the last 6-8months running the regen almost once a tank, i know this because it does this when the fuel guage is below 1/4 and i'm starting to look for a fill-up. Doesn't seem to matter if it's all hwy driving or around town.
A trip to the dealer for the 35k punch list and i mentioned this to the service people. Once a tank is not what i was sold.
While waiting i walked through the 2010 lot and a salesman came out and i we talked about the 2010 dmax and he said the regen was every 8-10kmiles.
I laughed.
Then back to the service dept and they said there were no codes that came up so the DPF was working to specs.
But every tank seems still to be excesive.

You?
Here is what I have seen.
http://www.dieselplace.com/forum/showthread.php?t=319739

GM says every 1-1.5 tanks depending on fuel quality and treatment. I live in MN and while using winter grade fuel it is about every 2 tanks. 10K miles on the truck. Delete that !@#$

My truck regens maybe once every three tanks. I am running my PPE Hot+2 on level 6, which probably runs more efficiently and cleaner than the stock tune. I'm also able to get 400 or more miles out of a tank of fuel.

Ok someone help this newbe understand what this regen(eration) is and why it does it and how does one know its doing it?
Regards,
Wanderer47

07.5 and up trucks now gome with a Diesel Particulate Filter known as a DPF. This traps all of the soot and once every ~400 miles or so the engine injects extra fuel into the exhaust raising the temperature in the DPF to burn off all the captured soot.

You don't need to know it's going on as it's really quite seemless and hardly ever noticable. If you don't drive fast enough or far enough for the regen process to happen the dash will light up and tell you to drive on the highway for a while to allow the regen to happen.

I've driven my truck for weeks on end doing less than 6 miles at a time never letting the truck warm up and never had a problem with the regen processe. Honestly dont' worry about it, I'm not real sure what all the hoopla is over trying to figure out when it's happening.

07.5 and up trucks now gome with a Diesel Particulate Filter known as a DPF. This traps all of the soot and once every ~400 miles or so the engine injects extra fuel into the exhaust raising the temperature in the DPF to burn off all the captured soot.

You don't need to know it's going on as it's really quite seemless and hardly ever noticable. If you don't drive fast enough or far enough for the regen process to happen the dash will light up and tell you to drive on the highway for a while to allow the regen to happen.

I've driven my truck for weeks on end doing less than 6 miles at a time never letting the truck warm up and never had a problem with the regen processe. Honestly dont' worry about it, I'm not real sure what all the hoopla is over trying to figure out when it's happening.


Thanks LMM_guy, now that I know that, like U said don't understand all the goings on about it here?
Regards,
Wanderer

Thanks LMM_guy, now that I know that, like U said don't understand all the goings on about it here?
Regards,
Wanderer

All so there's the part of using extra fuel to burn the soot I figure about 2 or more gallons,and that happens every 400 miles or so. Waste of money brings the cost of overhead up.
Rich

All so there's the part of using extra fuel to burn the soot I figure about 2 or more gallons,and that happens every 400 miles or so. Waste of money brings the cost of overhead up.
Rich

It's been well documented here and other places that a typical regen uses about 3/4 of a gallon of fuel during a regen event. That adds about $2.00 to the cost of a tank of fuel at most.

Here's a good thread that discusses this:

http://www.dieselplace.com/forum/showthread.php?t=276532&highlight=regen+fuel

When I was making consistent short trips I could get 300 miles out of a tank, so every OTHER tank would have a regen factored in. I would get ~1.5 mpg less on that tank than the tank without the regen. So on average you get about 3/4 of a MPG less with the DPF.

There are mileage gains to be had with tuning, a lot of guys see a decent mileage increase when they remove the DPF and load a tune at the same time. They mistankenly think that it's all from removing the DPF when in fact the tune had a lot to do with it.