Mobil Delvac MX ESP 15W-40 is an extra high performance diesel engine oil that helps extend engine life in the most severe on and off-highway applications. It is specially formulated with Trimer additive technology and a mixed detergent system to deliver cutting-edge performance in both new and older engines. Features and Benefits Superior soot-viscosity control: Mobil Delvac MX ESP 15W-40 helps to control soot build-up and maintain oil viscosity, even under extreme conditions. This helps to protect your engine from wear and tear, and extend its lifespan. Outstanding TBN retention: Mobil Delvac MX ESP 15W-40 maintains its high alkalinity level over extended periods of time, which helps to neutralize acids that can build up in the engine and cause corrosion. Excellent resistance to oil consumption: Mobil Delvac MX ESP 15W-40 helps to reduce oil consumption, which can help to keep your engine running smoothly and efficiently. Superior oxidation stability: Mobil Delvac MX ESP 15W-40 res