leave the engine idling vs leave the engine idle

Both phrases are correct, but they are used in different contexts. 'Leave the engine idling' refers to keeping the engine running, while 'leave the engine idle' means to leave the engine in a state of not running. The choice between the two depends on whether you want the engine to continue running or not.

Last updated: March 15, 2024

leave the engine idling

This phrase is correct and commonly used in English.

This phrase is used when you want to instruct someone to keep the engine running without turning it off.

Examples:

Please leave the engine idling while I run into the store.
It's not good for the engine to constantly start and stop, so it's better to leave the engine idling.
The mechanic asked me to leave the engine idling so he could listen for any unusual noises.
You can't leave the engine idling for too long, it wastes fuel.
The driver was instructed to leave the engine idling to keep the air conditioning running.

Alternatives:

Keep the engine running
Let the engine stay on
Don't turn off the engine
Keep the motor running
Leave the motor running

leave the engine idle

This phrase is correct and commonly used in English.

This phrase is used when you want to instruct someone to turn off the engine and leave it in a state of not running.

Examples:

After parking the car, remember to leave the engine idle before turning it off completely.
It's important to leave the engine idle for a few minutes after a long drive to let it cool down.
The manual says to leave the engine idle for a minute before shutting it off.
Don't forget to leave the engine idle for a bit before shutting it down.
The mechanic advised me to leave the engine idle for a while to prevent overheating.

Alternatives:

Turn off the engine
Shut down the engine
Stop the engine
Switch off the engine
Cut the engine

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leave the engine idling vs leave the engine idle