What is an undesirable effect of starting an engine with insufficient lubrication?

Starting an engine with insufficient lubrication poses a significant risk of engine damage, making the chosen answer accurate. Lubrication is crucial for reducing friction between moving parts within the engine. When the oil level is low or the oil is degraded, it fails to provide the necessary protective film, leading to metal components rubbing against each other more aggressively. This increased friction can result in excessive heat buildup, scoring of surfaces, and ultimately, the potential for catastrophic failure such as seizing or breaking essential components.

In contrast, increased fuel efficiency, reduced engine noise, and improved performance are all outcomes that can be associated with well-maintained engines that operate with proper lubrication. However, if an engine is started without adequate lubrication, it will negatively affect all these parameters due to the resulting damage. Therefore, the emphasis on the higher risk of engine damage is crucial for understanding the importance of proper lubrication in engine operation.