Z-ROD 20W-50 Synthetic Motor Oil Specially engineered for classic cars. Contains high levels of ZDDP, top-tier additives and rust inhibitors to protect your passion, deliver maximum performance and keep your classic engine free of rust and corrosion in storage. PROTECTS FLAT-TAPPET CAMS Formulated with high levels of ZDDP to protect flat-tappet cams, lifters, rockers and other areas susceptible to wear. High-zinc, high-phosphorus formulation provides the extra wear protection critical splash-lubricated components require. Fights wear to help prevent compression loss for maximum horsepower. HEL