Topping Off a Coolant Leak Without Radiator Fluid on Motor MythBusters Every human carries a spare water reservoir—it’s called your bladder. Jordon Scott Writer MotorTrend Group Photographer ...

Learn how to check and maintain the six essential fluids that keep your car running smoothly, from engine oil to windshield washer fluid.

For some vehicles, you're advised to change the coolant every 30,000 miles. For others, changing the coolant isn't even on the maintenance schedule.

There are two checks you can easily do on your coolant: whether you have enough of it and if it’s still protecting your engine in cold temperatures.

Hello Paul, my Mercedes C200 engine coolant fluid in the plastic reservoir has developed a milky brown colour. During a service, my mechanic observed this and suggested it might indicate oil ...