Has anyone gotten their Cascadia OneBox past a million miles?

The key is keeping the carbon (unturned fuel) down. I use Pittsburg Power Max Mileage on a pre-egr S60. And I know 100% for sure that it works. 2 years ago I changed a turbo out after using it for 5 years and wiped clean with a paper towel the carbon off the turbine blades. For comparison, I have a couple of old turbos in my shop, and I couldn't get the carbon off without using steel wool. My soot is always low on regular oil samples, too. But if you don't want to pay what amounts to $0.09/gallon extra to use the stuff, pulling and cleaning the DPF every 250k is the only other preventative maintenance that I know of. Maybe cleaning/changing the egr valve and line would help too. I don't know for sure-never owned a post 2002 truck. I personally know someone who has a 2008 S60 Detroit (no DEF after treatment) who has 1.4 million miles without ever having to go into the engine. He did everything exactly according to maintenance schedule that Freightliner manuals said. And he never used Max Mileage.

 

Diesel Force Cleaning maybe??

 

In the aftertreatment system there is an SCR (Selective Catalyst Reduction) to reduce NOx along with the DEF fluid. Key word is catalyst just like a catalytic converter in a car. Over time the materials 1 - wear off, 2 - become inert and weaker and don't do the job they were designed to do and have to be replaced. Tests of material along the road have been shown to include catalytic converter material.
Some DPF also have a catalyst. On the Cummins X15 they got rid of the 7th injector and replaced it with a DOC (Diesel Oxidation Catalyst) before the DPF.
Everything wears out over time including us humans.
There was another thread on here where it was said that 700k on a Detroit one box was really good and that was about all one was going to get out of it.
Another driver on here had between 700-800k on a Detroit and it kept derating even after cleaning the DPF. Time to replace.

 

@JB7

First off I want to thank you for your efforts on chiming in and assisting members on TTR having issues. Your interest and experience is a welcome sight.

I wanted to comment on your post quoted above to help give a better understanding of the hydrocarbon doser (7th injector) or lack there of on a Cummins X15.

The ISX 15 and X15 have always had a DOC on the after treatment to create the heat needed for DPF regeneration. The doser was removed and dosing is now completed by the main injectors in cylinder and raw hydrocarbons are expelled to the after treatment on the exhaust stroke after the combustion process. Referred to as in cylinder dosing. Cummins has been doing this on midrange engines since 2007.

 

Just hit 800k on my 2016 Cascadia with no issues so far knock on wood. It's an Expedite Straight truck so it's had a generator it's entire life so zero to very little idle time. I do run Hot Shots Secret Diesel Extreme every 7500 to 10k miles since 600k. Should still have it when it hits a million since prices are so high no way we'll buy another one any time soon.

 

Its a wear item. Eventually the DPF will fill with ash and it will have to be replaced.

Ash isn't combustible, it is the leftover residue after a regen is done. After a while the DPF is just full and needs to be cleaned out.

 

Take a hammer to the filter media…….. problem solved

 

I know this post is old but I got 1.4 million on mine about to change it now. I can tell you this lots of codes can mean a lot of things. And mechanics will tell you that you need a new one box. They did me 500000 miles ago. I figured if I was gonna change the one box offensively I was gonna end up changing everything anyway. So before I did the one box I did. I changed the metering valve The pump Scenters wiring harnesses. Doser Block/injector
It lasted another 500000 miles. But did all my own work had the downtime with the mechanic cost it would have killed me.

 

my one box in my 98 has13gears lol glad i don't do this modern stuff