Many drivers were taught to let the engine idle for several minutes before setting off in the cold. It feels kind to the car.
For most modern fuel-injected engines, gentle driving warms things up faster and with less wear.
Why idling is not ideal
An idling engine warms up slowly, and while it is cold it runs a richer fuel mixture. That wastes fuel, increases emissions, and can leave fuel residue that dilutes the oil. In many places, leaving an engine idling unattended is also illegal.
What to do instead
- ▸Start the engine and clear all windows of ice and mist first
- ▸Wait 30 seconds to a minute for the oil to circulate
- ▸Drive gently for the first few miles: moderate speeds, no hard acceleration
- ▸Avoid high revs until the temperature gauge is near normal
Visibility comes first
The one thing you must not skip is clearing the windscreen, side windows, mirrors, and lights. Driving with a small peephole in the ice is dangerous and illegal in many countries. Clear snow off the roof too, so it does not slide onto the windscreen when you brake.
Exceptions
In extreme cold, a block heater or a slightly longer warm-up may be recommended — check the owner’s manual. Electric cars benefit from preconditioning the cabin and battery while still plugged in, which saves range.
CAUTION: This is general automotive information, not professional mechanical advice. Always follow your vehicle manufacturer’s specifications and service schedule, and have brakes, steering, tyres, and other safety-critical systems inspected by a qualified mechanic.