How well does vegetable oil work as a motor oil substitute? The difference in viscosity between these two oils reveals why ...

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 when ...

Engine oil is a vital component of internal combustion engine vehicles. When the correct oil is used at the proper frequency, it keeps the car running smoothly while extending the life of the engine.

Walk into any parts store and you'll see the rows of glossy bottles promising to stop engine wear, boost fuel economy, and make your old clunker run like it just rolled out of the factory. The auto ...

Home mechanics have been pouring vegetable oil into engines for years, sometimes in the fuel tank, sometimes straight into ...

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

A vehicle's lifespan depends on a multitude of factors. Taking care of the engine, fuel tank, battery and more will help it ...