Chevron Delo 400 SAE 15W-40 XLE Diesel Synthetic Blend, gallon, premium synthetic blend, long drain mixed-fleet engine oil specifically formulated for on-highway applications including 2017 greenhouse gas (GHG 17) compliant diesel engines, provides high performance piston deposit control & turbocharger protection due to its superb oxidation performance, its high performing detergent & dispersant additives provide excellent diesel engine component protection, engineered to deliver longer oil life, better wear protection and longer engine life.