If your car's engine oil gets too hot, the car can overheat and both the engine components and the oil itself can be irreversibly damaged.

Motor oil is one of the most important fluids in your vehicle. The purpose of motor oil is to reduce friction and keep a vehicle's engine clean and corrosion-free. Another critical function is to ...

In normal operation, engine oil temperature needs to be at least 212 degrees F to get rid of destructive moisture and combustion contaminants.

This synthetic motor oil performs well in both high temperature and cold temperature environments and is long-lasting with a life of up to 20,000 miles between engine oil changes.

It's acceptable to use 0W-20 engine oil in place of 5W-20 or even 10W-20, since the number preceding the W refers to its low-temperature viscosity.

The operating viscosity of a 0W-5 grade motor oil at 100 degrees is the same as a 20W-50 at 240 degrees, so oil temperature is a very important factor," Lake explains.

With so many options for motor oil, it can be overwhelming finding the perfect option for your vehicle. We go over the details to help you understand which engine oil is best for your car.

Read about the differences between Conventional Petroleum Oil and Royal Purple Synthetic Oil as we test a 2007 Toyota Tacoma, and discover how each could benefit or harm your vehicle in this issue ...

It doesn't matter if you have a hybrid or conventional gas-powered car, a good motor oil can make the difference between a long-lasting engine and a sputtery ride. Here's what you should look for ...

An extensive effort is under way to revise the SAE Engine Oil Viscosity Classification System to reflect user needs more realistically. To understand how the present system evolved, the history of the ...