If you do use snow tires during the winter months, when it isn’t winter and there is no snow on the ground you should replace your winter tires with summer tires or all season radials.
Why? Big snow tires with deep treads use more gasoline than lighter tires. Remember, snow tires are made for traction, which translates into friction, which in turn translates into less than optimum gas mileage.
Many times people leave their snow tires on all year round just so they can avoid the hassle of taking their car to the mechanic but this is a huge mistake performance wise, and it also shortens the useful (winter months) life of your snow tires a great deal – they wear out sooner!
The amount of savings that you can get out of changing your tires each season should inspire you to make that appointment with your mechanic rather than “drag” your car down all throughout the year. The better care you take of your winter tires the longer you can keep them, reducing the amount of money that you spend maintaining your tires and your car.
Many people overlook the importance of maintaining tires when it comes to saving at the gas pumps. This sort of reasoning just dumbfounds me, because air is cheap (when I was a kid it didn’t cost anything), self-inspections are free, and depending on where you purchase your tires, you get free rotation and balancing. It’s really a no-brainer - do it and you save gas/money.
And remember, to maximize the most savings that you can achieve at the gas pumps you need to pay attention to all the details of maintaining and driving your vehicle, not just your tires.
Oh, and remember to never start a sentence with “and”. 
