What is the impact of low oil levels in an engine?

Low oil levels in an engine can lead to increased engine overheating due to the insufficient lubrication that oil provides. Oil plays a crucial role in maintaining engine temperature by reducing friction between moving parts. When the oil level is low, there is less oil available to circulate and cool the engine components. This can result in higher temperatures, as parts can rub against each other without adequate lubrication, generating additional heat. Prolonged exposure to these higher temperatures can seriously damage engine components, leading to failures or requiring costly repairs.

The other options suggest outcomes that are typically associated with adequate oil levels, rather than low oil conditions. Improved fuel efficiency and enhanced power output rely on the engine operating optimally, which is compromised when lubrication is insufficient. Similarly, reduced wear and tear is directly linked to proper oil levels that protect engine parts, rather than the detrimental effects seen with low oil levels.