Key reasons why warming up your car is bad: It takes longer, wastes fuel, and increases the wear and tear on car’s engine.Cold winter mornings are half-gone but this is an advice that really comes in handy. Some people tend to fire up their cars and leave them running for more than five minutes, thinking they’re reducing wear and tear by allowing their cars warm up gradually. But Jason from Engineering is here to explain why you shouldn’t do that to your car.

Actually, there is no need of warming up your car in winter.

The conventional understanding that you should idle your car up to operating temperature arouses from the days of carburetors, which needed few minutes of idling to get to an operating temperature so they’d run easily. With fuel-injected engines, the Engine Control Unit can adjust itself to idle flawlessly even in below freezing. And as Jason explains in the video, idling an engine doesn’t really build up a heat at all, compared to driving it.

In the video below, Jason goes through the details of what happens in a cold engine and calls attention the hidden damage of allowing your car idle for a long time on a cold winter day: Engine oil dilution. As it turns out, all that idling time leads to raw gasoline seeping into the oil, breaking down the oil’s lubrication properties and increasing the wear.

So what is the right thing to do? Start the car up; make sure all your windows are clear of ice/snow/fog, and just drive! The engine will warm up faster than before and therefore you’ll get warm heat coming out of the vents faster, which is what you want anyway.

Let a real engineer explain why you should stop warming up your car in the video below: