What could happen if you overfill your engine with oil?

Explanation: If the engine contains too much oil, the moving parts can hit the oil surface, causing a loss of power or even damage to the engine. Excess pressure may damage oil seals, causing oil to leak onto the road, creating a slippery and dangerous road surface.

Category: Vehicle Condition

References: The Official DVSA Guide to Driving Buses and Coaches: Section 2, The Official DVSA Guide to Driving Goods Vehicles: Section 2