What are those puddles in the driveway?

Never ignore those mysterious puddles under your vehicle. In addition to following a regular maintenance schedule, you should make a habit of looking under your car for leaks. Certain fluids are vital to your car's engine-they lubricate, cool and protect it. If you allow these fluids to leak, you may be risking serious damage to your car-and to your safety. Certain visual signs can serve as early warnings:

Black or dark brown - Usually found under the engine, these spots are likely to be engine oil. It's not unusual for an engine to leak small amounts of oil over a period of time; although if you see puddles larger than a tablespoon, you should take your car in for diagnosis and repair.

Bright green or bright yellow - These puddles are probably formed by radiator coolant or anti-freeze leaking form the cooling system. If you notice even a moderate amount of fluid, have the radiator level checked immediately.

Rust or orange - These colors usually mean there is rusty water in the cooling system. Be sure to get this problem fixed by a professional and pay close attention to future maintenance.

Red or pink - If you find these spots under the center of a rear-wheel drive car, a good bet is they're from the automatic transmission. A small amount is nothing to worry about, but you should consult your service technician if more than a little is found. If your car is front-wheel drive, red or pink fluid that is found toward the front of the car may or may not come from the automatic transmission.

Red, pink or clear - If you see this fluid on the driver's side toward the front bumper, be sure to feel its consistency. If it's oily to the touch it's probably power steering fluid. Check the car an add fluid as necessary. Brake fluid is also clear in color. To tell the difference, put a little on your finger and add water. Power steering fluid will remain oily and stay on your finger, while brake fluid will wash away.