How long does unopened jar of miracle whip in hot car last?

Miracle whip, like mayonnaise, is a highly perishable food product that contains a high amount of fat, making it susceptible to spoilage. Unopened jars of mayonnaise or Miracle Whip should never be left in a hot car, as they can quickly become unsafe to consume. The general rule is to discard any jar that has been left unopened in a hot car for more than two hours.