High Performance Advanced Synthetic Formula Low Ash Diesel Engine Oil. Mobil Delvac 1™ ESP 5W-40 is an advanced synthetic heavy duty diesel engine oil that helps extend engine life while providing long drain capability and potential fuel economy for modern and latest diesel engine technology operating in severe applications. This product is formulated to deliver exceptional performance in modern and older, hard working, engines, including those with emission control systems. Mobil Delvac 1 ESP 5W-40 is recommended for use in a wide range of heavy-duty applications and operating environments found in the on-road transport and off-road mining, forestry, construction, and agricultural industries. The outstanding performance of Mobil Delvac 1 ESP 5W-40 is the result of extensive cooperative development work of ExxonMobil with major equipment builders and application of the latest lubrication technology. As a result, this product meets or exceeds the requirements of the latest API and ACEA industry specifications for diesel engine oils, as well as the requirements of many major American, and European engine manufacturers. Mobil Delvac 1™ ESP 5W-40 is an outstanding lubricant solution for modern and latest engine technology equipped with emission aftertreatment. It was developed by ExxonMobil to maintain unsurpassed oxidation stability while also delivering exceptional low temperature fluidity and pumpability for smooth starting in cold down to -35°C. This feature, in combination with the sophisticated additive system, ensures exceptional engine wear performance and supports long engine life. The low ash formulation protects at the same time all exhaust aftertreatment devices to maintain cleaner air requirements. The advanced engine cleanliness performance prevents deposits and keeps the engine running like new for long and efficient engine life. Recommended by ExxonMobil for use in: Most engine generations up to latest and most sophisticated high performance diesel engines with turbo-charger, direct injection and low emission designs, featuring all types of exhaust after-treatment technology. On-highway engines operating in both high speed/high load and stop-and-go conditions. Off-highway engines operating in severe low speed/heavy load conditions. Most diesel powered equipment from American and European equipment builders. High performance gasoline engines and mixed fleets. Refrigeration units. Please refer to the owners handbook for OEM application requirements and oil drain intervals for your vehicle or equipment. his product meets or exceeds the requirements of the following industry and builder specifications: API CH-4, API SM, API SN. This product meets or exceeds the requirements of the following industry and builder specifications: JASO DH-2, CATERPILLAR ECF-3, Cummins CES 20081, CUMMINS CES 20086.