Generator is a Cummins C20 N6HC, 20KW propane, air-cooled.
The owner's manual calls for 0W-30, "Full synthetic gasoline engine oil which meets or exceeds API service SN/SN-RC and ILSAC GF-5".
Does Mobil 1 ESP 0w30 meet this spec? Bottle says ACEA C3, and for API the data sheet just says "API...