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Old 09-18-2017, 10:59 AM   #1
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Force HD Cummins 8.9 ISL Oil Capacity

With a filter change is this engine taking exactly 7 gallons? The manual says something about, depends on oil pan and such.
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Old 09-18-2017, 11:16 AM   #2
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Cummins says 7.3 gallons. Big difference from my 6.7's 3 gallons. Hope you have good luck with it. Owned one since they come out with the 5.9, can't beat them.
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Old 09-20-2017, 09:57 AM   #3
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Actually the manual says between 24 and 28 quarts depending on configuration, So I added 24 quarts and this seems to be the magic number.
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