A fresh puddle under a parked car is more than a cosmetic nuisance. Mechanics warn that a stray drip can be the first visible sign of a failing system, from the engine to the brakes, and that waiting ...

Conventional green coolant lasts two to three years or 30,000 to 50,000 miles. Extended-life orange and red coolants last five years or 100,000 to 150,000 miles under normal operating conditions. The ...