SERVICE PRO® Premium Synthetic Blend Motor Oils are premium performance automotive engine oils especially formulated to meet the stringent lubrication requirements of today's engines. Manufactured with a blend of full synthetic and high viscosity index Group II base oils combined with an industry leading additive package to ensure maximum protection against wear, rust, corrosion, oxidative thickening, acid formation and sludge. This formulation protects against low-speed pre-ignition and chain wear found in late model engines, while maximizing fuel economy. Always follow manufacturer's recommendations for viscosity grade and API Service Category.