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2008 Dodge Ram 3500, 14.5k miles, Rotella T6 #5435736 05/22/20 09:52 AM
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A_Harman Offline OP
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Weather is warming up. Towing travel trailers. 14,500 miles on this OCI.

Polaris comments:
OXIDATION is at a SIGNIFICANT level. Drain interval may be over-extended, or unit may be running too hot. Viscosity is
MODERATELY HIGH. Causes include contamination, oxidation, incorrectly identified viscosity grade, or adding a different
viscosity grade to the component. VISCOSITY INCREASE may be due to lubricant oxidation. Base Number is SLIGHTLY LOW. As
Base Number depletes, the ability to neutralize acids is diminished. Cylinder region metals (pistons, rings, liners etc,) are at a
MINOR LEVEL; Soot is at a MINOR level and is not yet cause for concern. Monitor future samples for increasing levels. Elevated
soot reduces combustion efficiency and may indicate varying load conditions, malfunctioning EGR, exhaust restriction, or a
timing/air-to-fuel ratio imbalance. Maintenance action indicated at time of submission (fluid/filter change , filtration, etc.) will
have corrected the issue this system is exhibiting. No further maintenance action is recommended at this time. Please provide
missing application and sump information.

Polaris has flagged oxidation on this sample as significant. I shortened this interval 20% to reduce oxidation, yet it has increased over the last sample. And KV100 has increased out of grade, even more than the last sample. The Cummins engine has a jacket water oil cooler, and coolant operating temperature has been steady at 200F regardless of whether I am towing or not. I need to start reading oil temperature separately. Maybe a Scangauge?

Soot at 2.2% should have been lower than the previous sample, but it was the same despite the shorter OCI. I have been getting an intermittent error code complaining about Low EGR Valve voltage.

I supplemented the new fill of RT6 with 5.5 oz of Redline ZDDP additive to see if it could reduce the oxidation. But based on this UOA, I don't think it will help much. The oxidation problem seems to be trending worse.

Dodge-UOA.PNG

2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5435747 05/22/20 10:11 AM
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loneryder Offline
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Looks to me like you are wearing out your truck with long oci's. I don't think adding the zinc will help. The oil still has plenty in it.

Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: loneryder] #5435765 05/22/20 10:39 AM
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2004tdigls Offline
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I don't understand why vehicle owners neglect to change the oil and then wonder why the engines wear out prematurely

oil is cheap, engines are very expensive, just change the oil more often

Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5435827 05/22/20 11:58 AM
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Jetronic Offline
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Not all engines have an actual oit temp sensor even if OBD has an oil temp reading. It will be a calculated value in that case and is completely useless. Maybe check if you can find a part number for an oil temp sensor?


AR Giulietta 2.0 JTDM-2 -- Total Quartz 9000 Energy 0w30
Hankook Ventus V12 evo2 235/45R17
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5435847 05/22/20 12:19 PM
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GMguy84 Online Content
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YIKES !!!! 14K?? Isn't that pushing it, even on a diesel ?????


And im the goof who does my OCI's @ 5000K with Shell or Mobil full syn crazy


Dave


01 Silverado 1500HD Shell RGT 5W30/XG3675

82 Trans Am (KITT) M1 10W40HM/XG5
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5436014 05/22/20 03:59 PM
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claluja Offline
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Al and Cr tending lower. Good there. Wonder if oxidation and soot would be normal, or close to normal, if did a 8-10K OCI given EGR in there? Emissions stuff kind of forces shorter OCIs. Wouldn't be too concerned unless an 8-10K OCI didn't help.

Iron still artificial from added iron to fuel, so won't really be able to tell anything about the iron for another OCI or two. But trending in right direction.

My 2 cents.


2014 F250 6.7L PSD
2006 Sequoia 4.7L
2005 E500 5.0L
2018 Jeep Rubicon, Pentastar 3.6L
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5436030 05/22/20 04:29 PM
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daves87rs Offline
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Guessing since this tows in all crazy MI weather- You are getting to the stage where the truck is just aging.

216K is darn good- she might be ready for shorter OCIs and some high mileage oil.

Pretty sure she’s earned it... smile


2020 Chevrolet Trax LS
2019 Chevrolet Equinox LS
2006 Chevrolet Cobalt LS
2004 Chevrolet Cavalier (project)

Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5436047 05/22/20 04:44 PM
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addyguy Offline
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I’d say try a new oil, despite being a good one, RT6 isnt up to the task here for the OCI you want for your business.

Or be willing to go with a much shorter OCI, which may not be an option. I don’t think a bit of a zinc additive at this point will fix it.


2010 Kia Soul 2U - 2.0L I-4, auto; 153k miles.
Castrol GTX 5W-20; Motomaster MPH 9688

2009 Pontiac G5 - 2.2 I-4, auto, 121k miles.
Oil/filter TBD
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5436214 05/22/20 08:37 PM
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mattd Offline
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That oil cannot handle the high oil temperatures that engine is creating. It’s worth monitoring the oil temperature especially towing. Back down the OCI or try a different lube.

JMO


2007 Ford F-350 4x4 6.0 PSD

ASE Master, L1, L2
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5436399 05/23/20 05:35 AM
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10k changes may be the sweet spot for that Cummins.


2012 Ram 2500 SLT 6.7L Cummins 4x4
2018 Dodge Durango GT 3.6L 4x4
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: 2004tdigls] #5436450 05/23/20 06:58 AM
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A_Harman Offline OP
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Originally Posted by 2004tdigls
I don't understand why vehicle owners neglect to change the oil and then wonder why the engines wear out prematurely

oil is cheap, engines are very expensive, just change the oil more often


I didn't add the Redline to decrease wear. ZDDP is also an anti-oxidant.

Last edited by A_Harman; 05/23/20 06:59 AM.

2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: claluja] #5436459 05/23/20 07:09 AM
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A_Harman Offline OP
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Originally Posted by claluja
Al and Cr tending lower. Good there. Wonder if oxidation and soot would be normal, or close to normal, if did a 8-10K OCI given EGR in there? Emissions stuff kind of forces shorter OCIs. Wouldn't be too concerned unless an 8-10K OCI didn't help.

Iron still artificial from added iron to fuel, so won't really be able to tell anything about the iron for another OCI or two. But trending in right direction.

My 2 cents.


I only used the Better Diesel FBC additive for about half this OCI. And on the OCI before this one, I wasn't using it at all. It is a little curious that Iron wear rate was lower in this UOA, despite the use of the FBC, but Iron wear isn't the thing that's worrying me now. I'm going to continue using the fuel additive to keep the DPF clean, so I'll just assume that part of the Iron reading is coming from the FBC.


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: daves87rs] #5436464 05/23/20 07:13 AM
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A_Harman Offline OP
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Originally Posted by daves87rs
Guessing since this tows in all crazy MI weather- You are getting to the stage where the truck is just aging.

216K is darn good- she might be ready for shorter OCIs and some high mileage oil.

Pretty sure she’s earned it... smile


She's just maturing. My old truck went 577,000 miles on 30,000 mile oil changes. But it didn't have all those cursed emissions systems. And the irony of it all is my old truck only smoked a little more than my new one.

Last edited by A_Harman; 05/23/20 07:14 AM.

2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: addyguy] #5436483 05/23/20 07:31 AM
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A_Harman Offline OP
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Originally Posted by addyguy
I’d say try a new oil, despite being a good one, RT6 isnt up to the task here for the OCI you want for your business.

Or be willing to go with a much shorter OCI, which may not be an option. I don’t think a bit of a zinc additive at this point will fix it.


I have been thinking of trying Delvac 1, but it is harder to find and more expensive than Rotella T6, which I can get at any Walmart in the nation.

Shorter OCI is probably inevitable. The first oil interval I did with the truck was Delvac 1300 Super at 11,000 miles, and it did not thicken out of grade. But the Oxidation reading was 21, which is in the ballpark of the readings I've been getting with RT6. It doesn't seem possible to me that Delvac 1300 conventional would be more oxidation resistant than RT6, and that is leading me to think that something is degrading in the EGR system. I talked to my local diesel truck mechanic yesterday, and he said he has about 50 reconditioned EGR coolers and control valves for my model of truck, so I am planning to have them installed this week after I get back from North Dakota. I checked prices on Rock Auto last week, and the cheapest that I could get a cooler and control valve for was $1020. This emissions carp is expensive. My mechanic says he can hook me up with reconditioned parts for about $500.


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500, 14.5k miles, Rotella T6 [Re: A_Harman] #5436499 05/23/20 07:42 AM
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4WD Offline
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Walmart.com is around $30/gallon and this to end of May

https://www.mobil.com/en/lubricants/2020-mobil-delvac-rebate-program

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