HARVEST KING CONVENTIONAL SAE 30 MOTOR OIL - is formulated to provide engine protection under severe operating conditions. Conventional SAE 30 is made from selected and highly refined base oils compounded to provide protection against wear and corrosion. Helps prevent oxidative thickening and inhibits promotion of engine acids, sludge, and varnish deposits. Follow manufacturer’s recommendation for viscosity grade and API service category. Meets or exceeds the requirements of API Service SN, SM, SL, and SJ