The parts department where I work has a can of Mobil Special 10w30, API rating of SF-CC. This is the cardboard carton with the metal top. What would be the date range for this oil?
My guess would be early '80's. You can pin it down by checking the API web site. I believe I saw a listing of effective dates for the various API Classifications. (SE-SF-SG-etc.)FWIW-Oldtommy