This Lucas Oil Hot Rod and Classic Car motor oil is manufactured with the highest quality paraffinic base oils. It's fortified with a unique additive package containing high levels of zinc, molybdenum, and phosphorus, which provide a tougher, thicker additive film for maximum protection, even under the most severe conditions. It improves film strength between the cylinder wall and piston rings, slows oil burning, and improves pressure in worn engines. Lucas Oil Hot Rod and Classic Car motor oil has good cold-temperature properties, stands up to high operating temperatures, and is compatible with methanol and all racing fuels, as well as with synthetic and non-synthetic oils. The oil is designed for use in muscle, showroom, classic, and trophy cars without catalytic converters and can be used in racing applications. It is not recommended for passenger car use.