Car Care Tips

A. According to automotive experts, regularly scheduled oil filter changes are the single most important item for prolonging engine life. Most new vehicles have recommended oil filter change intervals of 7,500 miles and some new vehicles have recommended oil change intervals of 11,000 to 15,000 miles under normal operating conditions, with "normal" operation described as the operation of the vehicle for at least 20 minutes at a medium speed, with a steady throttle and in a clean driving environment.

Short hops to the store, stop-and-go rush hour driving, driving on dirt roads and inclement-weather operation are all considered severe operating conditions that can cause impurities to build up quickly in the oil, resulting in increased wear and tear on internal parts. That is why most owner's manuals and mechanics recommend changing the oil and filter every three months or 3,000 miles (whichever comes first) to assure that maximum engine lubrication occurs while a minimum of impurities are suspended in the oil. To find out what the recommended oil change frequency is for your vehicle, check your owner's manual or talk with your automotive service professional.

A. If your air conditioning system is blowing hot air instead of cool, the refrigerant gas may have leaked out, you may have a clogged condenser, or the air conditioner's blend door may be stuck. Whatever the cause of the problem, the air conditioning system needs immediate service. Turn the system off. You can cool the vehicle interior by putting the ventilation control in the "vent" position and/or opening the windows.

A. Most car care experts advise having an automatic transmission's fluid and filter changed every two years or 24,000 miles to keep it in good working order. This is especially important if the vehicle is more than five years old. Many vehicles newer than five years old may need scheduled service less often and some new vehicles have transmissions that need no scheduled service for the life of the car.

By-the-book service, however, may not be adequate if your vehicle is driven hard, tows a trailer, goes off-road or carries a camper. Under these conditions, the fluid and filter may need to be changed more often — every 12 months or 12,000 miles — because dirt and moisture buildup in the fluid can cause internal damage. Heat buildup can also be a problem. The harder the transmission works, the hotter the fluid gets and the quicker the fluid breaks down. To find out the recommended service schedule for your vehicle's transmission, check the owner's manual or talk with your local automotive service provider.

Manual transmissions generally need no regularly scheduled service, but may need service due to worn clutch and throw-out bearings and broken synchromesh gears. Check your owner's manual for specific information on manual transmission service or talk with your local automotive service provider.