BP Lubricants Americas is launching Castrol® GTX Diesel to meet the need of a changing oil market. To prepare installers for this opportunity, BP Lubricants Americas has launched Castrol® GTX Diesel 15w-40 oil for superior lubrication for passenger cars and light truck diesel engines. Castrol® GTX Diesel is engineered to protect the engine from piston deposits, oil thickening and valve train wear, while minimizing the formation of engine sludge through the use of anti-wear additives, anti-oxidants and detergents.