When your car engine is cold, the fuel injectors send more fuel through the system. As the engine warms, it needs less fuel to run efficiently. So the longer you let a cold engine idle, the more fuel you waste and the more you increase the chance of fuel residue build up.
How does cold weather affect your car?
The effect of cold weather on cars can be extremely ruthless. A car engine comprises some exceptionally small parts that will go numb when you start the car again. Leaving car outside in cold weather would never be a good option.
Should you warm up your car before driving in cold weather?
If you idle your car in cold weather for too long, you might be wasting your time and money. Some people believe it is better to warm-up a car before driving away, but experts say that doesn't take as long as you might think.
Is it safe to drive with a cold?
Driving with a heavy cold is nothing to sneeze about. Safe driving needs good reactions and concentration, which can both be affected when the driver is poorly. In the past, we found that almost 1 in 5 drivers take to the road while unwell.* For many, it was due to flu or a heavy cold. Is driving with a cold potentially dangerous?
What happens to your car's engine when you idle it cold?
"Idling your car in the cold not only wastes fuel, but it's also stripping oil from critical components that help your engine run, namely cylinders and pistons," says Stephen Ciatti, a mechanical engineer who oversees the combustion engine work at Argonne National Laboratory in Illinois.