Check your tire pressure regularly, especially after there has been a sharp drop in temperature. Turn the car off when it is stopped. Ten seconds of idling uses more fuel than restarting the engine. Install a block heater for easier starting, fewer emissions and less need for idling. A heater can increase winter fuel consumption by as much as 10 per cent.
Open windows can be a fuel-saving alternative to air conditioning at low city speeds.
However, at highway speeds open windows increase drag and heighten fuel consumption. Aggressive driving saves little but increases fuel consumption and emissions. However, fuel consumption increases by 39 per cent and some toxic emissions were more than five times higher. Remove ski racks and roof racks when not in use. They increase a vehicle's aerodynamic drag.