Save fuel and extend engine life with Mobil Delvac 1 ESP 5W-40, a synthetic heavy-duty diesel engine oil that supports exceptional performance in low emission diesel engines. Delvac 1 ESP 5W-40 maintains its viscosity and performance at the higher temperatures where standard diesel oils begin to degrade, a property that reduces engine wear and ultimately results in longer engine life. Recommended for use in mixed engine fleets and with all super high performance diesel applications, including modern low emission engine designs Exhaust Gas Recirculation (EGR), after treatment systems with Diesel Particulate Filters (DPFs) and Diesel Oxidation Catalysts (DOCs). Meets requirements of API CJ-4/CI-4 PLUS/CI-4/CH-4/SM/SL; ACEA E7, E9; Caterpillar ECF-3, ECF-2; Cummins CES 20081; Twin Disc S364A. | Mobil Delvac 1 ESP 5W-40 Synthetic Heavy-Duty Diesel Engine Oil | Size 1 gal