On average, diesel engines are larger in size and run hotter than their conventional counterparts. A diesel engine shines in long-haul trips, after all, so it needs more muscle and lubrication to keep up its speed and performance. That said, even a diesel engine only needs so much oil on a regular basis. If your diesel engine is chugging oil like a kid who just tasted their first soda, that’s a sign something’s gone wrong.
Similarly to conventional engines, excessive oil consumption in a diesel engine is usually caused by a leak somewhere in the casing or components, allowing the oil to escape from the engine and enter spots where it isn’t supposed to be. Not only can constantly topping off the oil be expensive, but it could be a sign of failure or wear in multiple spots, including the gasket, oil pan, oil drain plug, or oil filter.
