How does alcohol affect the lubrication in small engines?

Alcohol has a significant impact on lubrication in small engines because it has the potential to dissolve protective oil films that are crucial for maintaining proper lubrication. When alcohol is introduced into the fuel system, it can break down the oil films that coat engine components, leading to reduced lubrication effectiveness. This breakdown can cause increased friction and wear on moving parts, which may ultimately result in engine damage over time.

In contrast to other fuel additives or components, alcohol does not enhance lubrication or have a neutral effect. Instead, it compromises the protective layer that engine oils provide, which is intended to minimize wear and heat generation within the engine. Additionally, while alcohol may contribute to fuel combustion efficiency in some contexts, that aspect does not pertain directly to the lubrication function of oils used in small engines.