Chevron Supreme 10W-40 Motor Oil is a conventional motor oil formulated to deliver reliable engine protection for gasoline-powered vehicles. This case includes 12 one-quart bottles, offering a convenient bulk value for routine oil changes.

Chevron Supreme is engineered to protect against sludge, varnish, and harmful deposit buildup that can clog oil passages and reduce engine performance. It features a calcium- and magnesium-based detergent additive package along with zinc and phosphorus antiwear chemistry to help preserve bearings, camshafts, and other critical engine components. The oil carries an API SP service category rating and meets SAE J300 viscosity specifications for the 10W-40 grade, with a viscosity index of 149 and a cold-crank viscosity of 5,872 cSt at -25°C for reliable cold-weather startup protection. The 10W-40 viscosity is well-suited for older engines and vehicles operating in warmer climates where this grade is specified by the manufacturer.