What might happen to an engine if it runs low on oil?

When an engine runs low on oil, the critical lubrication that oil provides is significantly diminished. Oil lubricates the moving parts within the engine, reducing friction and allowing them to operate smoothly. Without adequate oil levels, those moving parts can start to experience excessive friction, leading to increased heat generation. As the engine continues to operate under these conditions, the heat can reach levels that are not sustainable, ultimately causing overheating.

Overheating can have severe consequences, including warping engine components, damaging gaskets and seals, and potentially leading to a complete engine failure. This failure occurs when internal parts are damaged so severely that the engine can no longer function properly, often requiring extensive repairs or replacement. Therefore, it's critical for proper engine maintenance to ensure that oil levels are regularly checked and maintained to prevent such catastrophic failures.