Valvoline Super Diesel 15W-40 Engine Oil 20LValvoline Super Diesel 15W-40 diesel engine oil is formulated to API CH-4, CG-4, and SJ specifications. Developed to prevent oil thickening due to soot build up, Super Diesel 15W-40 also protects critical engine components from the effects of corrosive combustion gases.Blending engine oils since 1866, Valvoline have not just been making them longer than anyone else, they have been improving them longer than anyone else. This century and a half of creating and innovating oils and lubricants makes it's hard not to look past the quality, heritage and range of Valvoline oils. Bringing to market some of the highest quality lubricants, cleaners and engine oil, Valvoline is a name trusted by millions of car enthusiasts worldwide. Features- Prevents oil thickening from soot buildup- Protects engine from wear due to corrosive combustion gases- Resists thermal breakdown- Reduces deposit and sludge formation- Combats the effects of high temperature deposits- Keeps engine cleaner for longer- Meets API CH-4, CG-4 and SJ specifications