Coolant is an essential liquid for internal combustion engines, but it doesn't last forever. Here's how long an open bottle will remain fresh.

The coolant in your car's radiator is not a forever liquid. Consumable fluids like engine oil, automatic transmission, and brake fluid need periodic replacement to keep your vehicle running reliably ...

The coolant inside your car's engine does more than keep it cool. Although your engine will run fine with regular water, coolant has anti-freeze and lubricating properties to prevent corrosion to ...