Torque Shop: Idling engine causes engine wear

Idling can contribute to incomplete fuel combustion, leaving residues behind which can damage the exhaust system. ST PHOTO: ONG WEE JIN
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I often see vehicles parked with their engines running. Besides polluting the air unnecessarily, will idling contribute to engine wear?

Other than to stop at a traffic junction, keeping a vehicle's engine idling under any other circumstances is illegal. There were 2,800 cases of idling engine offences in 2019, 3,200 in 2018 and 6,400 in 2016.

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