What is the main function of the oil system in a reciprocating engine?

The primary function of the oil system in a reciprocating engine is to lubricate components and reduce friction. Oil circulates throughout the engine, coating moving parts such as pistons, crankshafts, and camshafts. This lubrication minimizes metal-to-metal contact, which not only reduces wear and tear on engine components but also helps prevent overheating.

Furthermore, by reducing friction, the oil system contributes to the overall efficiency of the engine, allowing it to operate smoothly and perform optimally. While the oil system may play a role in cooling and can help remove contaminants from the engine, its fundamental purpose is to provide lubrication to maintain performance and longevity of the engine components.

In contrast, the other options do not align with the principal role of the oil system, as cooling and power increase primarily involve the cooling system, cleaning fuel injectors is a function associated with the fuel system, and monitoring engine temperature falls under the responsibility of temperature sensors and gauges rather than the oil system itself.