What can result from using the wrong lubricant in machinery?

Using the wrong lubricant in machinery can indeed lead to increased wear and overheating. Lubricants are specifically formulated to provide the right balance of viscosity, thermal stability, and protective properties suitable for particular types of machinery and operating conditions. When the wrong lubricant is used, it may not adequately reduce friction between moving parts, which can result in excessive wear over time. Furthermore, inappropriate lubricants may not be able to withstand the operational temperatures and conditions, leading to thermal breakdown and a reduced ability to dissipate heat. As a result, parts can become overheated, leading to potential mechanical failures and costly repairs.

The other choices suggest beneficial effects that are unlikely to occur when the wrong lubricant is used. Improved machine performance, extended equipment lifespan, and enhanced fuel efficiency are typically associated with proper lubrication that matches the machine's design and operating requirements. Using an unsuitable lubricant undermines these outcomes.