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To save fuel, a car is safely stationary during a prolonged stop outdoors. Is switching off the engine advisable when the vehicle and its instructions allow it?

Correct answer

Yes, if the stop is prolonged.

Yes. An idling engine consumes fuel; switching it off during a prolonged stop can avoid that consumption. IDAE recommends switching off for stops longer than 60 seconds, subject to safety and vehicle instructions. Do not switch it off indiscriminately at every stop or while moving. In tunnels or enclosed places article 115 duties apply, including keeping position lights on in the over-two-minute situation; that is not merely fuel-saving advice and there is no general bus exemption.

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All options

  • No, because it barely uses any fuel and it is worse to have to start the engine again.

  • Yes, if the stop is prolonged.

  • Yes, during all stops.

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