Most engine oils have different numbers on their labels. Here is what those numbers mean and if you can use 0W-20 in place of 5W-30.

Oil viscosity (that 5W30 or similar number) is simply a measure of how the oil flows when cold and hot. It doesn’t tell you how the motor oil performs against the conditions inside your engine.

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 ...

Keep your diesel engine in peak condition by using top quality diesel oil. Here are the most popular brands of diesel oil ranked from worst to best.

Costco sells house-brand motor oil under the Kirkland Signature label it uses for many other products. Does this oil pass the same tests other motor oils do?

All oil make look alike, but they vary in how they are made and what’s packaged inside the oil. Choosing the right oil can make or break your engine.

Changing the oil in your 2021 model year Ford Bronco isn't hard at all. But if this is your first time, be sure to check out this guide ...

Your car engine needs oil. However, are some oils really better than others? Here's why Royal Purple oil has both a good and a bad rap with drivers.