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 ...

Add Yahoo as a preferred source to see more of our stories on Google. The white cap on the side of the radiator serves a specific function. Photo: myHOMEBOOK Winter is the season when you use heating.