"let the engine idle" vs "let idle"

Question

"let the engine idle" vs "let idle"

Both phrases are correct, but they are used in different contexts. 'Let the engine idle' is used when referring to a vehicle or machinery, while 'let idle' is used when talking about a person or an action. They are not directly comparable as they serve different purposes.

Last Updated: March 25, 2024

This phrase is used to instruct someone to allow the engine of a vehicle or machinery to run at a low speed without engaging the transmission or any other functions.

Examples:

Before turning off the car, remember to let the engine idle for a few minutes.
The mechanic asked me to let the engine idle for a while to cool down.
It's important to let the engine idle after a long drive to prevent overheating.
Please let the engine idle while I check the oil levels.
The manual recommends letting the engine idle for a minute before shutting it off.

This phrase is used to indicate that someone or something is being allowed to remain inactive or without occupation.

Examples:

I decided to let my mind idle for a while and relax.
Don't let your talents idle; put them to good use.
The machine was left to idle for hours without any supervision.
She preferred to let the day idle away without any plans.
It's not good to let your car idle for too long as it wastes fuel.

Answer 1

let the engine idle

This phrase is correct and commonly used when referring to vehicles or machinery being left running without being used.

Answer 2

let idle

This phrase is correct and is used when referring to a person or an action being left without purpose or activity.

"let the engine idle" vs "let idle"

let the engine idle

let idle

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