Which type of oil is recommended for the Cessna 172?

The recommended oil type for the Cessna 172 is SAE J1966 aviation grade straight mineral oil. This type of oil is specifically formulated for aviation engines, providing optimal lubrication and performance under the various conditions faced in flight operations. Aviation oils are designed to meet the demands of high temperatures and pressures found in aircraft engines, ensuring reliability and longevity. The straight mineral oil also helps to ensure steady viscosity and reduces the risk of oil degradation, which is crucial for maintaining engine health during flight.

In contrast, kerosene is not suitable for use as engine oil in any aircraft due to its lack of lubricating properties. Multi-viscosity engine oil, while commonly used in automotive applications, may not meet the specific requirements for air-cooled aircraft engines, which can lead to inadequate lubrication and potential engine damage. Conventional automotive oil is not designed with the same standards as aviation oil and may not provide the necessary protection and performance under the operating conditions of an aircraft. Thus, the use of SAE J1966 aviation grade straight mineral oil is essential for optimal engine performance and safety in the Cessna 172.