I checked on my old baby, 97 Nissan Altima that I sold to a friend. He found a stash (~50 quarts) of old Sears Spectrum 10W-40 in paper/metal golden cans and used it to change oil in Altima. No starburst, no API markings, only SC and some other acronyms next to certifications statement. "Superior protection", cleaning abilities... marketing slogans abound. The can is similar to this: Is this oil safe to use or should he dump it?