A no-oil startup occurs due to which reason?

A no-oil startup occurs when there is insufficient lubrication present in the engine prior to starting it. Lubrication is crucial for minimizing friction between the various moving parts of an engine. Without adequate oil, the engine components can make direct contact, leading to damage. This condition can cause parts to wear out quickly, generate excessive heat, and result in the engine seizing or failing to start altogether.

Insufficient oil can result from various factors such as leaks, improper maintenance, or low oil levels, all of which can prevent the necessary film of lubricant from forming. This can lead to the internal components not being protected, ultimately causing a no-oil startup condition when the key is turned, as the engine’s components may be grinding against each other without the protection of oil.