Of all the systems in your car, perhaps the most important to your safety are the brakes. Modern vehicles use hydraulic fluid to transmit pressure from a master cylinder to individual cylinders at ...

Modern vehicles rely on a host of fluids to send us down the road. Some, like engine oil and coolant, are well-known, while others, like differential fluid, are less-familiar to average motorists.

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.