Castrol EDGE 10W-30 with Fluid TITANIUM transforms its physical structure to be stronger under pressure to keep metal surfaces apart and reduces friction for maximum engine performance when you need it most. Advances in engine technology have led to increased power and efficiency, meaning engines work harder and under higher pressures than ever before. Castrol EDGE 10W-30 is the natural choice for drivers who demand maximum engine performance from today’s modern vehicles requiring a high level of protection and higher performance oils.