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Old 07-31-2012, 08:26 AM   #1 (permalink)
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oil change .........

Hi,

My 2012 Dodge Ram 2500 with the 6.7L Cummins Diesel engine will soon be due for it's first oil change. Is it recommended to use conventional motor oil or full synthetic motor oil? Also, I know what the owner's manual recommends regarding oil weight, but are there different/better recommendations regarding oil weight?

Thanks,
Jim
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Old 07-31-2012, 08:56 AM   #2 (permalink)
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Weight according to your climate. The recommended weight takes care of most climate types, but if youre in miami you probably dont need to do the colder stuff

Synthetic or conventional is personal preference and your ability to pay the extra money synthetic costs. Im not sure at this point which one I will use
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Old 07-31-2012, 09:50 AM   #3 (permalink)
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I always ran synthetic in my gas engines for the added protection and extended oil change intervals (6000 is what I did). But since cummins recommends 7500 intervals, I may use conventional oil and change it every 6000 or 7000 miles. What do you guys do?
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Old 07-31-2012, 12:52 PM   #4 (permalink)
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- Bob is the Oil Guy is a huge source of information on oil and after reading a ton on there you can make an informed decision what oil is best for you.
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Old 07-31-2012, 01:22 PM   #5 (permalink)
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Before I was deleted my Ram wanted an oil change (according to the EVIC) every 2,000 miles due to the frequent regens. The oil was filthy too. I'm not sure synthetic makes much sense if you're changing that often. If you can get the 7,500 between changes it might.
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Old 07-31-2012, 02:31 PM   #6 (permalink)
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I switched to Rotella T6 Synthetic 5w-40 at around 10k miles.

I also use a Donaldson ELF7349 so now I can extend the drain intervals to 10-15k. YMMV.
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Old 08-02-2012, 09:56 PM   #7 (permalink)
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Due to the fuel contamination that occurs and The EXTREME variations in use, my suggestion is: Use convential oil as fuel will dilute syn oil just as quickly. change it based on the oil change indicator as it keeps track of the variables that occur.
one may need change at 3000 miles due to fuel dilution and number of regens required. Another may need change at 6000 miles. On my unit the message arrived at near 8000 miles. For these shorter change intervals, it is hard to justify the added cost of synthetic. On my 2000, I changed at up to 17500 miles and used syn oil with EOA perfromed appropiatelly.
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Old 08-02-2012, 11:11 PM   #8 (permalink)
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Old 08-02-2012, 11:28 PM   #9 (permalink)
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You can start running synthetic after your first oil change.

I started running Rotella T6 at about 50,000 miles. According to my last UOA from Blackstone Labs they stated everything looks good & to take a sample at 15,000 miles this time.

My truck is deleted, running the H&S XRT PRO on "No Power" & grossing 22,000 LBS - 34,XXX LBS almost daily. No oil bypass filter as of yet. I may order one in the next couple weeks.
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Old 08-02-2012, 11:32 PM   #10 (permalink)
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Quote:
Originally Posted by dozer12216 View Post
Due to the fuel contamination that occurs and The EXTREME variations in use, my suggestion is: Use convential oil as fuel will dilute syn oil just as quickly. change it based on the oil change indicator as it keeps track of the variables that occur.
one may need change at 3000 miles due to fuel dilution and number of regens required. Another may need change at 6000 miles. On my unit the message arrived at near 8000 miles. For these shorter change intervals, it is hard to justify the added cost of synthetic. On my 2000, I changed at up to 17500 miles and used syn oil with EOA perfromed appropiatelly.
I agree, when the truck goes into regeneration mode (dpf equipped) it causes fuel dilution there are several threads on here (why is my truck making oil) if u want to research.
After putting synthetic oil in my brand new hemi many moons ago at only ~500 miles it slowly burnt about 1.5qts an oil change at 5k a change. After that I've learned to wait for an engine to break in before adding slippery oils (full synthetics). I've read on this forum to wait 20k-30k miles.
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