It is more common in situations where fuel is injected at a very high pressure, such asating oil from the cylinder walls, travel past the piston rings and collect in the oil pan, thus increasing wear and also diluting the lubricating oil.
It is more common in situations where fuel is injected at a very high pressure, such as in a direct-injected diesel engine. The condensate may wash the lubricating oil from the cylinder walls, travel past the piston rings and collect in the oil pan, thus increasing wear and also diluting the lubricating oil.