Going full-synthetic can mean better engine protection and cold-weather performance at a higher price, but it may not be a needed upgrade for all cars. Changing your own oil is cost-effective, but oil ...

An ongoing Iran war is expected to cause a motor oil shortage and price increases in the United States. The U.S. imports a large percentage of base oils used in motor oil from the Middle East, a ...

New emissions and fuel-efficiency standards are forcing automakers to use more advanced engine technologies that require pricier synthetic oils. Tariffs and global supply-chain pressures are ...