Originally Posted by PDRig
This has my curiousity. The oil thickening seems excessive for the miles on this oil. I wonder how many hours are on these runs. OP. Have you been tracking hours at all?
2008 Dodge Ram 3500, 14.5k miles, Rotella T6
- Thread starter A_Harman
- Start date
My truck doesn't have an hourmeter, at least that I have been able to find in the information menu. New trucks I know have a total hours run and idle hours readouts on the vehicle information display. But my truck is a 2008.
Going by my logged hours and miles, I average 60 mph, so for the 14,500 miles of this OCI, it would be about 240 hours. Then there is idle hours, which I can only generalize about. When I am hooking up to a trailer and doing pre-trip inspection in the yard, it is about 45 minutes of idling. As long the weather is not too hot or cold, I idle the engine about 30-45 minutes on an overnight. If the weather is too hot, I run the A/C to be comfortable. If the weather is too cold, I run the heater to be comfortable.
Originally Posted by dnewton3
Better Diesel FBC will alter your Fe rates; it will skew the Fe in a UOA because it uses Fe to improve the soot burn-off in the DPF (or something like that). It will also have the propensity to alter oxidation. I cannot discuss the chemistry; beyond my skill set, but I accept it for what it is. This FBC phenomenon has been discussed before.
We really cannot compare this UOA to others without additives; not the same apple in the basket of oranges.
Mr. Harman per the manual:
NOTE: There is also an engine hour function. This
indicates the total number of hours the engine has been
running. To display the engine hours perform the following:
Place the ignition in RUN, but do not start the
engine. With the odometer value displayed, hold the trip
button down for a period of 6 seconds. The odometer will
change to trip value first, then it will display the engine
hour value. The engine hours will be displayed for a
period of 30 seconds until the ignition is turned off or the
engine is started.
Originally Posted by Dodgetracker
Mr. Harman per the manual:
NOTE: There is also an engine hour function. This
indicates the total number of hours the engine has been
running. To display the engine hours perform the following:
Place the ignition in RUN, but do not start the
engine. With the odometer value displayed, hold the trip
button down for a period of 6 seconds. The odometer will
change to trip value first, then it will display the engine
hour value. The engine hours will be displayed for a
period of 30 seconds until the ignition is turned off or the
engine is started.
Most welcome Sir, My Pleasure. Below is a good link from carbonite Cummins for quite a bit of information as well.
http://www.carbonitecummins.com/articles.html
Cant seem to attach PDF of owners manual in here, But I have it if you want me to email it to you. Just pm info if you would like.
Put the truck in my local diesel specialist's shop to check out the EGR system. He ran a scan, and found there was a code for High Crankcase Pressure. He says the crankcase vent filter is clogged. Maybe that is contributing to oil oxidation.
There is also a code for Low EGR Valve voltage, and they are checking that out.
Also will inspect the EGR cooler for leaks.
What Cummins' OCI for that little engine? The Heavy Duty Engines were at 15k, now maybe 20k OCI's.
Then again, the HD engine sumps are 4 x the capacity for only 2 x the displacement. So the "B" series is really working with far less reserve oil capacity than the "X" (N).
For a 2008 6.7 intervals are 7500 miles or 6 months.
Originally Posted by Dodgetracker
Mr. Harman per the manual:
NOTE: There is also an engine hour function. This
indicates the total number of hours the engine has been
running. To display the engine hours perform the following:
Place the ignition in RUN, but do not start the
engine. With the odometer value displayed, hold the trip
button down for a period of 6 seconds. The odometer will
change to trip value first, then it will display the engine
hour value. The engine hours will be displayed for a
period of 30 seconds until the ignition is turned off or the
engine is started.
Originally Posted by Dodgetracker
For a 2008 6.7 intervals are 7500 miles or 6 months.
I think they used a very short index on those non SCR trucks due to the heavy load the emissions systems put on the oil. Lots of egr and lots of regens.
Originally Posted by BrianF
I think they used a very short index on those non SCR trucks due to the heavy load the emissions systems put on the oil. Lots of egr and lots of regens.
![[Linked Image]](https://www.bobistheoilguy.com/forums/attachments/usergals/2020/06/full-74241-45409-egr_2.jpg)
Yeah that's a mess. Makes me wonder if the early models would be good candidates for bypass filter systems.
Originally Posted by Bighorn2500
Originally Posted by BrianF
I think they used a very short index on those non SCR trucks due to the heavy load the emissions systems put on the oil. Lots of egr and lots of regens.
Originally Posted by PDRig
Op,
Any updates on this? What came of the visit to your diesel shop?
Which oil are you planning to run this time?
Originally Posted by A_Harman
Originally Posted by Bighorn2500
Originally Posted by BrianF
I think they used a very short index on those non SCR trucks due to the heavy load the emissions systems put on the oil. Lots of egr and lots of regens.