The manual calls for an API CC straight 30wgt oil. This is for a marine application with engines with a recommended continuous speed of 2400RPM with pushes to 2800 rpm as conditions warrant. The boat is a trawler, so I can expect continuous runs of 6 to 8 hours a day with some days seeing upwards of 12 hours of continuous run.
Original owner has run Wolf's Head HD 30 in it for 38 years and has very good results. My concern is that the API CC spec has been obsoleted for close to 28 years. My experience is with flat tappet gasoline engines. Is there a analogous concern to the zinc issue in modern oil formulations for gasoline engines for diesel engines. Both Wolf's Head and PennGrade (Brad Penn) have told me that the CF rating will work in my Perkins. With all due respect, I just don't trust their technical support guys in both cases my Perkins engines left the factory before these guys left the womb. MOre to the point, neither of them seemed to really understand that engine wear patterns were directly impacted by the additives packages used in their oils.
Original owner has run Wolf's Head HD 30 in it for 38 years and has very good results. My concern is that the API CC spec has been obsoleted for close to 28 years. My experience is with flat tappet gasoline engines. Is there a analogous concern to the zinc issue in modern oil formulations for gasoline engines for diesel engines. Both Wolf's Head and PennGrade (Brad Penn) have told me that the CF rating will work in my Perkins. With all due respect, I just don't trust their technical support guys in both cases my Perkins engines left the factory before these guys left the womb. MOre to the point, neither of them seemed to really understand that engine wear patterns were directly impacted by the additives packages used in their oils.