Coastal Synthetic Blend SAE 10W-40 API SP is a premium-quality, high detergent, multi-grade motor oils. They contain a blend of synthetic and high viscosity index mineral oils combined with a carefully selected additive package which provides outstanding protection against wear, rust, corrosion, oxidative thickening, acid formation, sludge, and varnish deposits. API SP helps prevent pre-ignition, wear and provides improved cleanliness and fuel economy. Meets or exceeds API Service SP and all previous categories. API SERVICE SP, SN Plus, SN, SM, SL.