What gets less attention is what this cold snap is doing to your fuel bill. Cold weather can reduce fuel efficiency by 12% to 20% or more, and the effect is worse on short trips. Why cold weather burns more petrolA cold engine has to work harder before it reaches its most efficient operating temperature, and that warm-up period uses more fuel than normal driving. Checking tyre pressure regularly matters more in cold weather, since pressure drops as the temperature does. Have you noticed your fuel consumption creeping up during this cold snap?