Magic Plus Diesel Engine Oil API: CI-4 SAE 15W-40 is a high performance diesel engine oil that provides exnt lubrication to diesel engines. It maximizes performance in the latest US, European and Japanese heavy duty diesel engines including severe applications such as high loads and multi trailer applications. It exhibits outstanding detergent, dispersant and anti-wear properties to keep the engine clean and enable efficient control of soot, sludge and piston deposits.