Well, that question has become increasingly complicated in the last few years! A growing number of newer vehicles are calling for synthetic or synthetic blend oils from the factory. Newer GM engines are requiring Dexos compatible oil and Honda/Toyota and others are quickly adopting 0W-20 full synthetic for fuel economy and emissions purposes. Our bulk oil is a synthetic blend that meets GM's Dexos standards, Motorcraft's (Ford) standards are similar. If 0W-20 is required, it is full synthetic and we buy it by the quart, usually just using NAPA brand unless something specific is requested.
The best thing you can do is familiarize yourself with your specific vehicle's needs by reading your owner's manual. If that sounds too intimidating, complicated, or boring, just call us and we would be happy to chat with you about what is right for your vehicle.