Car Maintenance Tip for This Summer: De-Winterize Your Vehicle
First of all, get rid of those snow tires. Snow tires are heavy and will lower your fuel economy.
If you haven't driven your car very much during the winter, or if you've had it in storage, then you need to check all of the fluid levels -- coolant, transmission, differential, power steering and brake fluid -- to make sure there weren't any leaks. You'll also want to change the oil, since oil gets thick and collects condensation if it sits in the engine all winter. If you haven't used your battery in a while, you might need a recharge or a replacement.