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2002 CH15 6nz Cat motor

How often should I change the oil on my 2002 peterbuilt CH15 6nz Cat motor

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If your running oil by pass system then watch the oil sampling and if your not using a by pass system I would stay somewhere around 15,000 to 18,000 miles

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Depends on your operation and the type of oil used. Long haul, no idling, I have friends going 50K. Short haul, dusty conditions, 10K to 15K. I run a GulfCoast filter, long haul, do regular oil analysis and run my oil 60K. I change the GC at 15K, using Bounty paper towels, and the main filters at 30K, I could go farther on my oil change but choose to do 60K. They say Bounty won't work, will clogg lines, I don't know how long this will take but have been doing this for 7 years.

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mrcsmelton will be eternally grateful.
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