The average car has around 30,000 parts and many fluids are used to keep them running properly. The most important fluids are motor oil, transmission fluid, brake fluid, washer fluid and coolant.

Under every car’s hood, you’ll find a veritable nest of hoses and reservoirs filled with fluids, every one of them engineered to fulfill a specific role. And a part of being a responsible car owner is ...

Viewer-submitted questions for The Car Doctor: Q: Each weekend I look under the hood of my car like my dad taught me, and I noticed the brake fluid was a little low. I took it to a quick lube place ...