Motor oil has quietly become one of the most important choices car owners make, especially as vehicles routinely cross ...

The oil you put in your engine matters. After all, your engine contains many moving parts that must remain lubricated to work properly. Otherwise, your engine could develop some serious wear and tear.

Do modern cars need an engine break-in period? Automakers like BMW, Ford, Chevrolet, and Subaru say yes, but recommendations ...

But if you do what you can to maintain your vehicle properly, you can prolong the lifespan of your car. Taking care of the engine, fuel tank, battery and using the best quality products on your car ...

Most people understand that motor oil is a vital component for the internal combustion engines that power most of our cars. Not only does oil act as a lubricant, allowing internal moving parts to ...

Here are 2025's most popular questions and answers from The Journal's Car Doctor column, from rotating tires to oil changes.

For years, drivers were told that they needed to change their car's oil every 3,000 miles. But as engines have grown more efficient and oil formulas have improved, that rule of thumb is no longer a ...

Cars are, in general, a lot more reliable than they used to be. Newer manufacturing processes, better materials, and the advancement of onboard diagnostic technologies have certainly helped. Car ...