The Mobil Delvac 1 ™ ESP 5W-40 is a synthetic lubricant for heavy-duty, modern diesel engines that operate under demanding driving conditions. The oil support for longer engine life, as well as longer oil change intervals¹ and the possibility of better fuel economy². This product is designed to offer exceptional performance in modern and older, hard-working motorists, including those with emission control systems. Mobil Delvac 1 ESP 5W-40 recommended for a variety of demanding applications and operating environments in truck transport, mining, forestry, construction, quarrying and agriculture. The foremost performance of the Mobil Delvac 1 ESP 5W-40 is the new and new collaborative project between ExxonMobil and the store equipment manufacturer as well as the use of the latest sms technology. The result is that this product meets or exceeds the requirements of the latest API and ACEA industry specifications for diesel engine oils, as well as requirements of many major US and European engine manufacturers. ¹ See the owner's manual for information on how the manufacturer's use requirements and oil change intervals have been specified for your vehicle or equipment. ² Compared to a SAE 15W-40 engine oil. The actual savings will depend on the vehicle's engine type, outdoor temperature, driving conditions and viscosity of the current engine oil.