To keep an engine functioning correctly during storage, how often should it be run?

Running an engine periodically until it reaches its optimal operating temperature during storage is essential for maintaining its functionality. When an engine is not in use for an extended period, various components can deteriorate or become sluggish due to factors like oil settling, fuel degrading, and the accumulation of moisture. By running the engine until it warms up, you ensure that oil circulates properly, lubricating critical engine parts and reducing the risk of corrosion. This process also helps to burn off any moisture that might accumulate within the system.

Additionally, warming the engine allows for better combustion of any fuel that may still be in the lines and helps to keep seals and gaskets pliable. This practice not only preserves the engine's reliability but also prepares it for immediate usage when needed, minimizing the risk of potential issues when you start it up after a period of inactivity.

In contrast, options suggesting a daily or weekly requirement could lead to excessive use or unnecessary strain, while monthly intervals might not prevent issues that develop with infrequent operation. Thus, the recommendation to run the engine periodically until warm strikes a balance that promotes engine health without leading to overuse.