Is it necessary to turn off the engine when parking for three or four minutes?

[VanCameron]

It is necessary to turn off the engine when parking for three or four minutes. Reasons for turning off the engine when parking: Temporarily turning off the engine while parking is beneficial as it saves fuel and contributes to environmental protection. If the parking time exceeds 1 minute, the engine should be turned off. Generally, the fuel consumed by idling in small cars is more than the fuel consumed by restarting. For automatic transmission vehicles, if the expected parking time exceeds 0.5 minutes and you do not want to turn off the engine, the gear should be placed in N (Neutral); if the parking time is longer, the engine should be turned off. Harm to the environment from parking without turning off the engine: Theoretically, turning off the engine after 3 minutes of parking does help in controlling air pollution, but it is difficult to implement. The current difficulty in implementing the 3-minute parking engine-off rule is due to two scenarios where people are reluctant to turn off the engine. One is during hot summer days when prolonged parking for unloading or waiting requires the use of air conditioning; the other is at traffic lights, where drivers worry about slow engine restart and choose not to turn it off.