We have a 5.9 Cummins, a 6.7 Cummins and an 8.3 Cummins. the first two take 12 quarts oil engine ouil and my 8.3 takes 20 quarts.
If your engine took 20 quarts, then I would suspect that it is a 8.3. Find the serial number and that will really tell what you have.
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2009 38' Diplomat
CSM- retired, wife as co-pilot
Reka & Ali providing security (our 2 labs)
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