A: Regular, often referred to as standard or mineral oil, is derived from crude oil. It comes directly from the earth and is refined for use in internal combustion engines. Synthetic oil is designed at the molecular level to remove impurities, optimize oil for the specific demands of modern engines and deliver greater lubrication.
When put head to head, synthetic oil wins every time. Synthetic oil provides increased lubrication, delivers greater performance across a range of temperatures and helps reduce engine buildup of engine sludge. Although synthetic oil comes at an increased cost, it often reduces the oil change interval.