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I have not seen this as a problem. see the attached Oil Analysis on my 23 6.7HO
The first test on the sheet ( reading 13,000 miles ) was my 2nd oil change in this truck and was using Motorcraft 10-30 oil ( dealer did my first oil change at 5,000 miles and I did not pull an oil sample on that oil change)
The 21,483 and 31,000 mile test are Valvoline 5-40 oil.
In the third test at 31,000 miles on truck and with 9517 miles on the oil, all of my oil samples show fuel dilution is less then 0.5%
I know on the older trucks it was real. I've never seen it on my oil analysis, but the guy in the video sitting in dealer lot with two new trucks. It's probably not a threat he has to worry about and more of "I need a story for this weeks video"
I know on the older trucks it was real. I've never seen it on my oil analysis, but the guy in the video sitting in dealer lot with two new trucks. It's probably not a threat he has to worry about and more of "I need a story for this weeks video"
Yeah I thought the video was pretty stupid. It's ironic how people today won't read something if it's two paragraphs long, but will watch a 16 minute video with almost no useful information that could be summed up in basically a few sentences.
JB has some okay videos, but this one was painful to watch. Advising people to run heavier oil to offset dilution along with neglecting the season differences between parts of the country was dumb. I'll run what the manual tells me for my temp range/driving habits and change it often. I'm one that only NEEDS a diesel about 6 months of the year and it's my daily driver. Lots of 20 mile trips along with some < 5 mile trips during the cold months. I'll just run 5w40, change the oil a bit more often, send it in for analysis, and call it good. So far I've been impressed with the truck and found all the worries about regen'ing every 200 miles isn't what I've experienced. After 3 1/2 months, I'm at about 2.5k and never had a regen outside of the normal 500 mile cycle. I've only ever hit 80% on the DPF monitor.
Agree, I run 5w-40 and just change the oil more often. I don't think analysis is that critical either if you're not running long intervals. Sure it sucks not going as long as you could if the engine didn't have all the emissions systems, but changing oil is cheaper than replacing the engine. Diesels are expensive to own, but that's the reality.
I've run both 10W30 and 5W40 and been running 5W40 for quite some time and don't worry about UOA anymore. If you have ~2% fuel dilution, you should be able to see that on your dipstick level in which my oil level never moves from the full mark.
I've had several analysis done on my 2019, and all come back with less than trace amounts of fuel in them. Dilution happens on cold engines, and low RPM engines like when driven in City traffic. Stop and go highway also dilutes to a smaller extent. Then slow speed regen is also a contributor. Engines run at a constant high RPM with a load are far less likely to dilute even during a regen as it is moving air through the engine, which extracts any over fueling that might happen. Mine idles out the garage, turn around in the drive then 0-60 MPH pretty much all the way to work 60 miles away. It comes up to temp quickly, and is always moving air through it.
Its how the truck is used that determines fuel dilution and nothing more.
Then slow speed regen is also a contributor. Engines run at a constant high RPM with a load are far less likely to dilute even during a regen as it is moving air through the engine, which extracts any over fueling that might happen.
Ignore - I didn't see jollyrogr's comment that said exactly this.
With the 23+ MY having the 9th injector, it should reduce dilution caused by lower cylinder temp regens.
I have not seen this as a problem. see the attached Oil Analysis on my 23 6.7HO
The first test on the sheet ( reading 13,000 miles ) was my 2nd oil change in this truck and was using Motorcraft 10-30 oil ( dealer did my first oil change at 5,000 miles and I did not pull an oil sample on that oil change)
The 21,483 and 31,000 mile test are Valvoline 5-40 oil.
In the third test at 31,000 miles on truck and with 9517 miles on the oil, all of my oil samples show fuel dilution is less then 0.5%
Folks on this forum say Blackstone does not do accurate dilution calculations. I've always had your measure, but then I used Amsoil oil analyzers and it came back at 5% on a 7500 mile run. I have a 2021 so no ninth injector for me. I've been lead to believe it's the regen that causes the fuel dilution, but you have the 9th injector. I saw the other posts about slow speed, operation. I'm still getting used to the PowerStroke I guess, I never (nor did forum folks) have worries about oil dilution on my Duramax no matter how much it idled or drove slow and no oil analysis ever made me think otherwise. What's the difference?
I've quit testing because I know the dilution exists and I can smell it with my nose (a calibrated scientific instrument). I figure it makes sense to use the money saved to buy oil and run shorter OCI's. Blackstone detected 2.5% fuel dilution on my oil that had 5900 miles on it AND I had even added 2 quarts during the run because I had changed the bypass filter. I've since removed the bypass filter because it doesn't make sense on this engine (it adds to the oil quantity needed and you can't run longer OCI anyway due to fuel dilution).
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