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Old 02-03-2012, 04:30 PM   #1
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C9 Cat. Diesel how often should you change oil

How often should you change the oil in a C9 Cat. Diesel? Thank you.
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Old 02-03-2012, 04:39 PM   #2
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250 hours, 10,000 miles, or once a year...
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Old 02-03-2012, 05:54 PM   #3
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250 hours, 10,000 miles, or once a year...
Note time (1 year) takes precidence over mileage. In other words, 10K miles or 1 year, which ever comes first.

An annual oil change is a must to manage contaminants and moisture in the oil.
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Old 02-03-2012, 06:26 PM   #4
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Once per year before it's put up for winter.
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Old 02-04-2012, 01:41 PM   #5
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Thank you for the advice, we really appreciate it.
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Old 02-04-2012, 02:06 PM   #6
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Yearly along with fuel filters I don't get close to the milage.
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Old 02-04-2012, 02:38 PM   #7
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If you send in a oil sample for analysis after the calendar says you should throw it away unless I miss my bet they will say there is nothing wrong with it.

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Old 02-05-2012, 05:11 AM   #8
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Once a year, and as stated, don't forget the fuel filters, and don't forget to drain the water from the fuel/water seperator filter at least each fill up

My manual calls for draining the fuel/water seperator at the end of each day. I find that a little excessive, so I do it at each fillup.

Happy trails
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Old 02-06-2012, 09:21 AM   #9
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My Cummins ISL has an hour limit also. The manual says to change oil at 20,000 miles, 500 hours or 12 months.
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Old 02-06-2012, 09:58 AM   #10
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If you send in a oil sample for analysis after the calendar says you should throw it away unless I miss my bet they will say there is nothing wrong with it.

Jim
I've always wondered if the analysis shows the oil is still good and shows little usuage why change it if not driven that much??
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Old 02-06-2012, 10:08 AM   #11
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If you guys are set on following the book to the letter and you store your coach for a year after a oil change or just put 500 miles on it that means you MUST dump that oil out. Get real!!!

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Old 02-06-2012, 12:06 PM   #12
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Oil changes are tough for me....

My camaro gets once a year in the spring, regardless of miles....

My work truck goes by the monitor, and may be 10k or more...

The dp, not sure yet. I drove her 10k last year, and she will get oil and filters in the spring. Then we'll see.
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