Chevron Supreme 10W-40 motor oil is supplied as a case of 12 one-quart bottles, suitable for use in many gasoline engines requiring 10W-40 viscosity. The oil helps lubricate moving engine parts, reduce friction and wear, and can assist in maintaining engine cleanliness when used according to vehicle manufacturer recommendations. Sold in retail-ready packaging, this case format is convenient for automotive service providers or individuals performing multiple oil changes.