It depends on factors like your driving patterns and weather. For example, if you have driving habits that put a lot of stress on your vehicle or live in a warmer climate, then the additives in synthetic oil may be more beneficial for your car.  Get your motor oil at AutoZone. Whether your car needs conventional, synthetic-blend, or full-synthetic oil, we carry a variety of motor oil products to meet your needs. Before you change your oil, find the best motor oil for your vehicle by browsing our vast inventory. We're confident that we have a motor oil product to boost the health of your engine.