Preventive maintenance is a must. Besides, a well maintained vehicle is more enjoyable to drive, will last longer, and could command a higher resale price.
Cold weather makes existing problems worse.
Replace dirty filters-air, fuel, PCV, etc. Note that a gas tank which is kept filled helps keep moisture from forming. Cooling Systems - The cooling system should be completely flushed and refilled about every 24 months. The level, condition, and concentration of the coolant should be checked periodically. The tightness and condition of drive belts, clamps, and hoses should be checked by a pro.