No matter how hot, cold, steep, dusty, muddy or extended your operations, you need to know that your oil will protect your engine under all conditions. The Energised Protection of Shell Rimula heavy-duty diesel engine oils works relentlessly in three critical areas. Acid control is well-proven performance additives help to protect against corrosion from acids formed as fuel burns. Deposit control is helps to keeps engine clean for consistent performance and long life. Wear control is keeps moving metal engine surfaces apart for long engine life.