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2008 Dodge Ram 3500, 11kmiles, Mobil Delvac 1300 Super #5297034 12/17/19 03:58 PM
Joined: Oct 2010
Posts: 7,732
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A_Harman Offline OP
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This is a first sample with known oil and change interval, from about one month of RV transporting. 50% loaded, 50% empty duty cycle.

Polaris comments:
Flagged data does not indicate an immediate need for maintenance action. Continue to observe the trend and monitor
equipment and fluid conditions. OXIDATION is at a MINOR level, which may be due to extended drain interval or high operating
temperature. Iron is at a MINOR LEVEL. IRON SOURCES in engines can be cylinder liners, iron pistons, hardened steel
camshafts, crankshafts, gears, hardened rocker arms, valve bridges,alloyed steel cam follower rollers, etc. Lubricant change
acknowledged.

Iron wear is up significantly, but it isn't necessarily the oil because the miles on the previous oil sample was unknown. But the wear rate is pretty high compared to the later UOA's of my old truck.
Soot of 1.2% is significant, and may be a normal thing with an EGR engine.

Since the filter only had 11k miles on it, I did the oil change to RT6 without changing the filter, so the next sample will still have ~9% Delvac 1300 in it.
I still don't like the weak additive package of Delvac 1300, and probably won't use it again, at least without supplementing with a ZDDP additive.
The oil that was in the truck when I got it looked much better for antiwear.


Dodge-UOA.PNG
Last edited by A_Harman; 12/17/19 04:00 PM.

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, 11kmiles, Mobil Delvac 1300 Super [Re: A_Harman] #5297072 12/17/19 04:39 PM
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BrianF Offline
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Thanks for posting!! Nice to see decent viscosity retention and no fuel. That soot is interesting. I have not read many UOA on the ISB6.7, especially the pre SCR trucks. From what Cummins said, soot condemnation is set at 3%.

Iron appears high but really is there an unsafe iron wear rate with these engines?

I figured I would end up with high fuel and soot on mine from this past index. Decent amount of idle, cold weather and short trips. Mine has been around the 0.58% mark.


2006 Trailblazer LT. QSUD, Fram Ultra.
2017 Ram 3500 SLT Megacab. Duron SHP 10w30, Baldwin BT7349.
1993 GMC 1500. QSAD, Fram PH5
Re: 2008 Dodge Ram 3500, 11kmiles, Mobil Delvac 1300 Super [Re: A_Harman] #5297308 12/17/19 08:24 PM
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mattd Offline
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Definitely a weak add pack on that delvac.

I would continue to monitor soot level and iron wear per mile


2007 Ford F-350 4x4 6.0 PSD

ASE Master, L1, L2
Re: 2008 Dodge Ram 3500, 11kmiles, Mobil Delvac 1300 Super [Re: mattd] #5297311 12/17/19 08:25 PM
Joined: Oct 2011
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2004tdigls Offline
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here is a radical idea

CHANGE THE OIL

oil is cheap, engines are expensive

Re: 2008 Dodge Ram 3500, 11kmiles, Mobil Delvac 1300 Super [Re: 2004tdigls] #5297448 12/17/19 11:18 PM
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A_Harman Offline OP
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Originally Posted by 2004tdigls
here is a radical idea

CHANGE THE OIL

oil is cheap, engines are expensive


I did change the oil.
What are you getting at?


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, 11kmiles, Mobil Delvac 1300 Super [Re: A_Harman] #5297565 12/18/19 05:28 AM
Joined: May 2007
Posts: 8,407
dnewton3 Offline
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Wear rate for Fe isn't bad, but as you note, there's room for improvement. Can't compare it to the previous sample; unknown use duration.
A sample size of one isn't really much to go on, but you gotta do what you're comfortable with.
Let us know how the RT6 does.


The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
Re: 2008 Dodge Ram 3500, 11kmiles, Mobil Delvac 1300 Super [Re: mattd] #5307579 12/30/19 12:04 AM
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Dak27 Offline
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Originally Posted by mattd
Definitely a weak add pack on that delvac.



I’m thinking the same thing, I’m not overly impressed with Delvac Super 1300 15W40 after looking at this UOA.

I recently switched back to Delvac Super 1300 in the Pre-EPA Series 60 Detroit in my Semi Truck. This UOA made me “rethink” my decision to switch back to 1300 Super, and I just bought 10 gallons of Delo 400 XLE 15W40 to try after I’ve put a total of 15,000 miles on the Delvac that’s currently in my sump.

Last edited by Dak27; 12/30/19 12:05 AM.
Re: 2008 Dodge Ram 3500, 11kmiles, Mobil Delvac 1300 Super [Re: A_Harman] #5314839 01/06/20 12:56 PM
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SubieRubyRoo Offline
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Originally Posted by A_Harman
Since the filter only had 11k miles on it, I did the oil change to RT6 without changing the filter, so the next sample will still have ~9% Delvac 1300 in it.
I still don't like the weak additive package of Delvac 1300, and probably won't use it again, at least without supplementing with a ZDDP additive.
The oil that was in the truck when I got it looked much better for antiwear.


If you want, you could always play around with adding some of this:

[Linked Image]


De omnibus dubitandum.
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