Which of the following is NOT a function of lubricating oil in an engine?

Lubricating oil serves several critical functions in an engine, and one of its primary roles is to reduce friction between moving parts. By providing a slippery film that separates metal surfaces, it minimizes wear and tear, leading to longer engine life and improved performance. Additionally, lubricating oil helps cool the engine by dissipating heat generated by friction and combustion. It also plays a crucial role in preventing corrosion by forming a protective barrier that keeps moisture and contaminants away from metal surfaces.

Storing fuel, however, is not a function of lubricating oil. The fuel system, including components like the fuel tank and fuel lines, is specifically designed to store and deliver fuel to the engine for combustion. Lubricating oil and fuel are distinct fluids with separate purposes; while oil ensures smooth operation and longevity of engine components, it does not act as a storage medium for fuel. This clarification emphasizes the specific roles of lubricating oil and helps differentiate it from other engine functions.