関連ワード:  how much gas does a car use when idling    how much gas does a car use idling for 10 minutes    how much gas does a car use idling for an hour    how much gas does a car use    how much gas does a car use per mile    how much gas does a car use to start    how much gas does a car use in park    how much gas does a car use idling with ac    how much gas does a car use idling with heat    how much gas does a car use idling for 30 minutes