Which of the following is a common method for initiating engine overheating prevention measures?

Regulating oil temperature is a common method for initiating engine overheating prevention measures because oil plays a crucial role in maintaining the operational temperature of the engine. Proper oil temperature ensures that the engine components are adequately lubricated, reducing friction and excessive heat buildup. Viscosity of the oil changes with temperature; thus, managing the oil temperature helps in maintaining it within an optimal range, preventing overheating.

This proactive approach can involve monitoring the oil temperature indicator and adjusting the oil cooler or oil flow to manage heat dissipation effectively. Proper oil temperature not only helps prevent overheating but also enhances overall engine performance and longevity, as excessively high oil temperatures can lead to oil breakdown and decreased lubrication effectiveness.

In contrast, increasing RPM typically raises the engine's operating temperatures due to increased load and friction. Decreasing fuel supply might lead to a lean mixture that can also result in higher operating temperatures. Restricting airflow could directly exacerbate overheating issues by preventing adequate cooling to the engine components. Thus, regulating oil temperature stands out as a key preventive measure in managing engine overheating.