Cummins Onan RV Generator Handbook
Most of what you need to know is in here.
Cummins Onan RV Generator Handbook
While Onan is a Cummins product line, they typically incorporate Kubota or Isuzu diesel engines in generators used in our Class A coaches.
There are a couple of plates on your generator that identify the engine and give part numbers for oil, fuel, and air filters.
I searched the internet and found new-old-stock, genuine Onan filters at reasonable prices. Try Northwest RV Supply as a starting point.
Your generator will be happier with regular exercise than with synthetic oil and little exercise.
FWIW
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Dave & Cathy, 2002 Country Coach Affinity, 42', #6103, CAT C12, Sold - Retired From RV'ing, Linux Mint
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