VP Pro Grade 15W50 Racing Oil VP applies a 3-pronged approach to lubricant design. As a result, you get a remarkably stable 15W50 synthetic oil that allows race engines of all types to achieve extraordinary performance and durability. For starters, VP uses select base oils with polar characteristics. Consequently, it improves the ability of the oil to cling to metal components by improving viscosity. Secondly, VP adds a balance of multiple anti-wear chemistries into the oil beyond zinc (ZDDP). These anti-wear additives adhere to metal surfaces to create a tremendous layer of protection. Finally, VP includes unique friction modifiers that reduce both fluid-to-fluid friction and surface friction between the oil and moving metal components. This helps to unlock horsepower and torque.Another critical point is that we blend VP Pro Grade Full Synthetic 15W50 Racing Oil with an aggressive dispersant detergent package, which helps control both deposits as well as the oxidation stability of the oil. Therefore, it takes much longer for the oil to oxidize than other available brands.