What is the maximum duration without engine oil servicing (operating hours)?

What is the maximum duration without engine oil servicing (operating hours)?

• A. 24 hours
• B. 36 hours
• C. 48 hours
• D. 60 hours

Answer: (B)

Engine lubrication needs regular service to keep moving parts protected and free of contaminants. The maintenance schedule for the CRJ-550 sets the maximum time between engine oil services at 36 operating hours. This interval reflects how oil quality and filtration can degrade with use—viscosity can shift and contaminants accumulate—so staying within 36 hours helps ensure the oil remains effective at lubricating and cooling the engine. If you go beyond 36 hours, oil performance can drop, increasing wear risk and potential damage. Shorter intervals, like 24 hours, would be more conservative than required, while longer options such as 48 or 60 hours exceed the recommended limit.

Engine lubrication needs regular service to keep moving parts protected and free of contaminants. The maintenance schedule for the CRJ-550 sets the maximum time between engine oil services at 36 operating hours. This interval reflects how oil quality and filtration can degrade with use—viscosity can shift and contaminants accumulate—so staying within 36 hours helps ensure the oil remains effective at lubricating and cooling the engine.

If you go beyond 36 hours, oil performance can drop, increasing wear risk and potential damage. Shorter intervals, like 24 hours, would be more conservative than required, while longer options such as 48 or 60 hours exceed the recommended limit.