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2008 Dodge Ram 3500, first sample #5267973 11/15/19 09:44 AM
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A_Harman Online Content OP
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I bought this truck in Missouri, and put about 1000 miles on it before doing the first oil change.
I don't know the miles or type of oil in this drain interval, but will be doing more oil samples to settle on a change interval.

This truck has EGR and DPF emissions controls, so I was worried about soot and fuel dilution in this sample, but those readings are OK.
TBN was still very strong.
The previous owner seemed to be running an oil with decent anti-wear content: 173 Boron, and 1023 Phosphorous.
I also just changed the trans fluid last night, and the drain oil looked new. Maybe the truck was maintained conscientiously.

I put in a fill of Delvac 1300 Super, and have made some trailer deliveries in the past few weeks. The maintenance minder is already signaling for an oil change in only about 5000 miles. Cold weather has set in, and I have been idling the engine overnight, and there have been many regens. I think I'll extend to about 7000 miles, then take a sample to see how fuel dilution is.

So far, I'm not impressed with the fuel economy. I haven't done better than 9 mpg towing trailers that I used to get 10-11 mpg towing with my old truck. Running unloaded, the new truck hasn't done any better than 17 mpg, whereas my old truck was getting 21-24 mpg. On the plus side, the new truck has lower cab noise, and rides a lot better, so I'm less beat up at the end of the day.

Dodge-UOA.PNG
Last edited by A_Harman; 11/15/19 09:48 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, first sample [Re: A_Harman] #5268024 11/15/19 10:34 AM
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SteveSRT8 Offline
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Always good to get the unknown out and your oil in...


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix
Re: 2008 Dodge Ram 3500, first sample [Re: A_Harman] #5268032 11/15/19 10:45 AM
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Chris142 Online Content
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Plan on spending $600 for a fan clutch (its electrically operated by the ecm) plus labor every 80K.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: 2008 Dodge Ram 3500, first sample [Re: A_Harman] #5268109 11/15/19 12:08 PM
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Bighorn2500 Offline
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Last I checked I had about 3% fuel dilution near 7k miles. Idling will contribute to higher, barely ever saw 5k oil change light usually around 4400 mark. I went by UOA instead of Oil change life indicator.


2012 Ram 2500 SLT 6.7L Cummins 4x4
2018 Dodge Durango GT 3.6L 4x4
Re: 2008 Dodge Ram 3500, first sample [Re: A_Harman] #5269383 11/16/19 06:26 PM
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motor_oil_madman Offline
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Looks good


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: 2008 Dodge Ram 3500, first sample [Re: A_Harman] #5287608 12/07/19 10:32 AM
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rileyc Offline
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Given the UOA with Boron being 173, Calcium at 2236, Phos and Zinc over 1000, and the very low amount of Magnesium, this oil could be Rotella T4.

Re: 2008 Dodge Ram 3500, first sample [Re: A_Harman] #5287968 12/07/19 06:51 PM
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A_Harman Online Content OP
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Yes, it looked like pretty good oil.


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
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