What grade oil do you use for a Ford Transit van diesel 2.5 liter?

For a Ford Transit van with a 2.5-liter diesel engine, it is typically recommended to use engine oil with a viscosity grade of 10W-40 or 15W-40, depending on the climate and operating conditions. Always refer to the owner’s manual for specific recommendations, as it may vary based on the model year and specific engine requirements. It's also important to use oil that meets the required specifications, such as API or ACEA ratings.