Kirkland Signature motor oil is cheaper, but Mobil 1 motor oil has more anti-wear additives. Either way, it's not a bad idea to buy either one from Costco.

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 ...

We all know that motor oil is the lifeblood of the engine, and using the best quality and highest performance oil is a vital part of not only keeping the car on the road longer, but also operating at ...

Unique formula developed specifically for gasoline-fueled, light-duty trucks and SUVs* Provides extra protection for hardworking engines and outstanding performance under tough operating conditions ...