Think of motor oil as the life’s blood of your car’s engine. Checking it on a regular basis is a key part of keeping your engine running well and getting the most miles out of it. The oil lubricates ...

Checking your engine oil level is a quick, easy task that’s a crucial part of car maintenance. Keeping the right amount of oil in your engine will increase its longevity regardless of age, cylinder ...

Motor oil is an essential element of the engine. It plays a major part in lubricating the moving parts and helps reduce deposit build-up, prolonging the service life along the way. If you don't change ...

The color of your car's engine oil can tell you a lot about its overall health, including alerting you to potentially ...

At a time when vehicle diagnostics can demand a computer science degree, being able to get some insight into your engine health with nothing but a rag and a bit of know-how can be downright refreshing ...

Do you often find that your oil level is lower than you expect when you check it, or do you get a lot of grief from the tech at the oil change shop about your oil change intervals? If so, your engine ...

Your car's dashboard symbols generally fall under one of two categories: specific indicators with a single clear meaning and broad warnings with multiple potential causes. Specific indicators like the ...

Engine oil performs several vital functions: it keeps everything lubricated and running smoothly while also preventing corrosion inside the engine block, keeps things somewhat clean, and even helps ...

Originally developed for steam engines by John Ellis, motor oil is used for lubricating combustion engines. In addition to reducing the friction and wear on the moving parts, modern lubricants have a ...

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