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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I bought a new onan emerald in 1986 and still going strong and never used any oil other than mobil 1 10/30 . thirthy years and counting. Love that stuff and never had to add between yearly oil changes.
