PETRONAS Urania Prime Classic HM 20W-50 is a premium heavy duty engine oil formulated with StrongTech™ technology, that forms a uniquely strong fluid film to protect the engine, retain performance and keep trucks running and available for longer periods. This helps to reduce the total cost of ownership. Suitable for older generation heavy-duty diesel applications, especially with High Mileage, including high-output, turbocharged and naturally aspirated diesel engines, both on-highway and off-highway, running on high or ultralow Sulphur diesel and bio-diesel.