Engines need motor oil to run smoothly. It lubricates moving parts, reduces friction, minimizes wear, regulates engine temperature... it even helps keep the engine clean. That's why it's so important ...

Gaining a good understanding of your car's motor oil is crucial to ensuring it runs properly. If you're a Costco member, you may have come across the chain's exclusive Kirkland Signature Synthetic ...

Costco can do a pretty good job helping drivers save money, whether the company is offering a good deal on tires, or discounts on brand-new Corvettes, or a low-cost motor oil under its own house label ...

Natural gas probably isn't running your car, but it may soon be lubricating your engine. Royal Dutch Shell, which owns Pennzoil, Quaker State and other brands, is announcing Friday that it has already ...