Royal Purple uses premium synthetic base oils and proprietary additives to surpass the protection and performance demands of modern engines, which often feature smaller displacements, turbochargers, gasoline direct injection (GDI), and start/stop systems. Modern GDI engines have achieved unprecedented power and fuel efficiency, but this progress has led to higher loads on smaller engines, increasing wear and causing low-speed pre-ignition (LSPI). The advanced additive technology in Royal Purple High-Performance engine oils is specifically engineered to tackle these challenges, helping engines maintain optimal performance and reliability.       Weight: 10 lbs