Motor oil is one of the most important fluids in your vehicle. The purpose of motor oil is to reduce friction and keep a vehicle's engine clean and corrosion-free. Another critical function is to ...

Synthetic oils have caused countless debates and confusion across nearly every automotive forum, and often with good reason. Legally, the term “synthetic” has a pretty loose definition. While some ...

Motor oil has quietly become one of the most important choices car owners make, especially as vehicles routinely cross 150,000 kilometers and keep going. The debate between full synthetic and high ...

Semi-synthetic and synthetic blend oil sound very similar -- and they are -- but how can you tell the difference between the ...

Conventional motor oil or synthetic motor oil? That is the question when getting an oil change, and it's an important one. Both are designed to help keep your engine and its various components ...

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

Choosing the right motor oil is paramount to car maintenance. It's not a particularly exciting task, whether shopping for or changing your oil, but if you don't pay the proper attention, then you aren ...

Q: Is synthetic oil worth the extra bucks? – F. Akerman, Gulf Shores, Ala. A: We’ll go full weasel here and answer with a firm maybe. So-called synthetic oil is more stable and more likely to remain ...

A persistent debate around synthetic motor oil is whether it can be used in old cars. In this Engineering Explained video, Jason Fenske clears things up. The video is part of a series sponsored by ...

We get a lot of mail around the office, and one of the leading topics is in regard to engine and transmission fluids. Specifically, readers want to know more about synthetic-made oils versus petroleum ...

I’ve been getting a lot of mail regarding using synthetic motor oil in vehicles. Questions such as: Should I use synthetic oil? Does it work better in some cars than others? Does it cost more? Do I ...