• Before you do anything else, read your owner’s manual and follow the manufacturer’s recommended service schedules.
  • Get engine performance and driveability problems — hard starts, rough idling, stalling, diminished power, etc.  Cold weather makes existing problems worse.
  • Replace dirty filters, such as air, fuel, and PCV. A poorly running engine is less efficient and burns more gasoline.
  • As the temperature drops below freezing, add a bottle of fuel deicer in your tank once a month to help keep moisture from freezing in the fuel line. Keeping the gas tank filled also helps prevent moisture from forming.
  • Change your oil and oil filter as specified in your manual — more often if your driving is mostly stop-and-go or consists of frequent short trips. 
  • The cooling system should be flushed and refilled as recommended. The level, condition, and concentration of the coolant should be checked periodically. A 50/50 mix of antifreeze and water is usually recommended. Do-It-Yourselfers: Never remove the radiator cap until the engine has thoroughly cooled! The tightness and condition of drive belts, clamps, and hoses also should be checked regularly by a professional technician.
  • The heater and defroster must be in good working condition for passenger comfort and driver visibility.
  • Replace old blades regularly. If your climate is harsh, purchase rubber-clad (winter) blades to fight ice build-up. Stock up on windshield washer solvent — you’ll be surprised how much you use during the winter months. And don’t forget to always carry an ice scraper.
  • Have your battery checked. The only accurate way to detect a weak battery is with professional equipment. However, most motorists can perform routine care: Wear eye protection and protective rubber gloves. Scrape away corrosion from posts and cable connections; clean all surfaces; retighten all connections. If battery caps are removable, check fluid level monthly. A word of caution: Removal of cables can cause damage or loss of data/codes on some newer vehicles, so always check your owner’s manual first. Be sure to avoid contact with corrosive deposits and battery acid.
  • Inspect all lights and bulbs. Replace burned out bulbs; periodically clean road grime from all lenses. To prevent scratching, never use a dry rag. Clouded lenses can be refinished by many service outlets or by using a DIY kit found in major auto parts outlets.
  • Exhaust fumes inside your vehicle’s cabin can be deadly. Have the exhaust system examined for leaks and problems while the vehicle is on a lift. The trunk and floorboards should also be inspected for small holes.
  • Worn tires are dangerous in winter weather. Examine tires for remaining tread life, uneven wearing, and cupping; check the sidewalls for cuts and nicks. Check tire pressure once a month, letting the tires “cool down” before checking the pressure. Rotate as recommended. Don’t forget to check your spare, and be sure the jack is in good working condition. Under-inflated tires or poorly aligned wheels makes your engine work harder and thus use excess gasoline.
  • Have your brakes checked periodically for safety and to prevent costly repairs that can be caused by neglect.
  • The transmission is often neglected until a major failure. Routine checks and fluid changes at prescribed intervals can prevent very costly repairs down the line.
  • Always carry an emergency kit with you: extra gloves, boots and blankets; flares; a small shovel and sand or kitty litter; tire chains; a flashlight and extra batteries; and a cell phone and extra car charger. Put a few “high-energy” snacks in your glove box.