In-town fuel mileage decreases by five-to-ten percent in cold weather. This is caused by the winter fuel mixture and cold engines – they aren’t as efficient as warm ones. Combine your driving trips and check your tire pressure frequently to save gas. Are you trying to decide whether to mount studded or stud-less tires on your car this winter? I recommend stud-less because they handle better on dry or wet roads, do well in the snow, get better fuel mileage and cause far less damage to our roads and highways. You should check your tire pressure every month because it affects how your car handles, your fuel mileage and the life of your tires. You can find the proper tire pressure for your vehicle on the driver’s post or in the owner’s manual – not on the side of the tire.