Gulf Classic 20W-50 is a high quality 100% mineral oil based multi-grade oil designed for classic gasoline engines specially formulated with additional zinc additives. It contains 0.24% (2400 ppm) wear protective zinc additives which is the highest amount found in a 20W50 mineral engine oil. For comparison, Penrite Classic light has 0.18% (1800 ppm). Highly recommended for use in classic and muscle car engine applications.
