What kind of oil?? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 7 (permalink) Old 08-18-2014, 06:10 PM Thread Starter
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What kind of oil??

What kind of motor oil is everyone running in their cummins? I run the delo 15W40. I was looking at the delo 400 5W40 synthetic and wondered if it would be worth it to switch motor oils. I just rolled over 74,000 miles.
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post #2 of 7 (permalink) Old 08-28-2014, 04:09 AM
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I also run the delo 15w40. Also run it in all the farm equipment of all colors

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post #3 of 7 (permalink) Old 08-30-2014, 06:57 AM Thread Starter
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Any one else?
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post #4 of 7 (permalink) Old 08-31-2014, 07:27 PM
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post #5 of 7 (permalink) Old 09-01-2014, 12:15 AM
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I've been running Mobile 1 5w-40 for the last 6 years and have never had a bad report when I turn in a sample. I believe in the 5w-40 since it covers most temperatures during the winter/summer, no matter what state I travel throughout the year.

As for having 74k on the clock ? I have an old friend that went from regular oil to full sync oil at 225k with out issue. I believe it's the best thing you can do for your engine.


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post #6 of 7 (permalink) Old 09-02-2014, 04:10 AM Thread Starter
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Thank you all for the input
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post #7 of 7 (permalink) Old 11-25-2019, 02:00 PM
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Only use Rotilla T6 on ALL my vehicles - has or diesel... Incredible value - excellent oil.

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