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Old 05-19-2015, 08:12 PM   #15
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My dodge manual wants the oil changed at I believe 7500 miles even if it is synthetic, I use chevron 15-40 cj,from costco or wallmart.....and change at 4-5000 miles....
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Old 05-19-2015, 08:26 PM   #16
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Steve , we used 40 miles/ hr, so 300 hours would be like 12000 miles,that is what we used on off road or close hauls,also I don't believe in these extended oil changes, I always changed oil in my cat every 10000 miles, now has 1.4 million miles,the head has never been off, rolled new bearings in at 1 million and they had very little wear.
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Old 05-19-2015, 09:45 PM   #17
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I've been changing my Cummins' oil at 5-6000 miles using Mobil Delvac because that was the only oil that met the requirement (CJ-4) of the '12 engine that Walmart had when I got it.

I used to use Rotella sysnthetic in my Duramax, and changed it at 10,000 miles, but the Ram supposedly won't tolerate that many miles on the oil, even if it is synthetic, so I use the Mobil Delvac. I get it for just under $13 a gallon, so not too bad.

I do remember the Rotella came out just as black as the Mobil, so I think Diesels are just like that.
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Old 05-20-2015, 07:50 AM   #18
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Interpreting points. I have always held to the around 5000 miles on the oil change in diesel pickups. I just got a 2015 dodge 3/4 ton diesel..Interesting point of which i am wondering. The truck actually has a visual readout in the instrument panel which actually tells when the oil change is needed. That I wounder about. But with all the technology these days it might be right, but at the rate it is changing it says it will run between 10, 000 and 12,000 when it needs to be changed. For the life of me I cant see how it knows, but who am i to say, the question then becomes do i believe that gauge or my guts.
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Old 05-20-2015, 07:57 AM   #19
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Interpreting points. I have always held to the around 5000 miles on the oil change in diesel pickups. I just got a 2015 dodge 3/4 ton diesel..Interesting point of which i am wondering. The truck actually has a visual readout in the instrument panel which actually tells when the oil change is needed. That I wounder about. But with all the technology these days it might be right, but at the rate it is changing it says it will run between 10, 000 and 12,000 when it needs to be changed. For the life of me I cant see how it knows, but who am i to say, the question then becomes do i believe that gauge or my guts.
When I first got my '12 Ram, the computer was calling for an oil change every 3,000 to 3,500 miles. I read on the truck forum that the type of DPF regeneration the truck used caused a lot of fuel to get into the oil, and the oil level actually increases, and that is how the computer knows when to change the oil, by the oil level, as well as other factors such as miles and time.

The solution to the quick oil changes on my truck was to not put the full 12 quarts of oil in at the change, but put 11 quarts in it, and now it will go 5 to 6,000 miles.

I believe the '13's and later are different.
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Old 05-21-2015, 09:03 AM   #20
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The fuel is injected in the exhaust after the engine , the level goes up because of the soot from reburning the a portion of the exhaust, the cj 4 oil was developed to carry the contaminates ,just my take on this
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Old 05-21-2015, 09:08 AM   #21
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The fuel is injected in the exhaust after the engine , the level goes up because of the soot from reburning the a portion of the exhaust, the cj 4 oil was developed to carry the contaminates ,just my take on this
My understanding is the fuel was injected into the cylinders on the exhaust stroke, and that's how it got into the engine oil over time.

Anyway, I know for a fact the oil level goes up, and that is one of the ways the 'puter knows when to change the oil.

Anyway, I no longer have the problem.
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Old 05-21-2015, 12:43 PM   #22
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Steve, have you considered that with less fresh oil in the engine, the contaminants represent a higher percentgage of the total as they fill up the crankcase? This could mean less engine protection in two ways: a higher percentage of contaminants, and a longer time the engine has to suffer them.
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Old 05-21-2015, 01:19 PM   #23
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Steve, have you considered that with less fresh oil in the engine, the contaminants represent a higher percentgage of the total as they fill up the crankcase? This could mean less engine protection in two ways: a higher percentage of contaminants, and a longer time the engine has to suffer them.
Yes, I've considered it. We're talking about one quart in three gallons, maybe, and there is a filter.

Additionally, I've been having samples of the oil that is drained out tested frequently with no issues found.
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Old 05-21-2015, 02:35 PM   #24
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If you watch Napa's website they sometimes have Valvoline Premium Blue 15w-40 on sale for $10.99 gallon. This is an oil approved for the Cummins Engine though other properly rated oils are fine too. I only go 5k oil changes due to the emission components. If they were removed I would go 10k for sure with a synthetic oil.
The 2007.5 and newer Dodge trucks use an algorithm based upon how you drive the truck for when the oil gets changed.
I usually go with Hastings filters (same as Baldwin) or I can get the Mopar filter from Walmart. I would also be comfortable with a Napa Gold filter since it is a Wix brand in disguise.
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