Onan BFA Oil - Why not 20W-50?
Note: Our typical camping climate range runs from 10F to 115F (if we go to Redding, CA in the summer... otherwise up to about 105 in Southern Oregon.) Clearly Onan/Cummins have updated their recom...
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As for oil pressure the general rule is approximately 10psi per 1000rpm's. Thicker is generally not better. This is coming from a guy with over 35 years rebuilding Type-4 ACVW engines.
