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

Everything, even the smallest of things, can affect the performance of your engine. Whether topping off your fuel tank or driving on motor oil past its expiration date, you're slowly killing your car.

Oil is a vital component for engines of all types. Not only is it responsible for providing lubrication to numerous moving interior parts, but it also helps prevent friction and the development of ...

Your car's engine, whether gas, diesel, or hybrid, requires sufficient oil to operate smoothly. Too much oil is bad for any engine, but the right amount offers protection against cold starts, reduces ...

Engine oil top ups and changing it are basic maintenance vows that a car requires, however one cannot be replaced by the other. There is a reason why manufacturers state and define a particular ...

Engine oil is a crucial component of just about every engine, and it needs to be replaced regularly, according to the manufacturer's recommendations, to ensure the engine is working as it should.