Description Product OverviewHarvest King HD 30 Motor Oil â 5QT is engineered with highly refined base oils and a carefully selected additive package to ensure optimal performance in high viscosity applications. It offers comprehensive protection against wear, rust, corrosion, oxidative thickening, acid formation, sludge, and varnish deposits. Meets API SL, SJ, and SH service categories.Product FeaturesImproved fuel economyIncreased sludge protectionEnhanced piston cleanlinessIncreased emission protectionILSAC GF-5 Resource Conserving formula