Technological advancements have allowed today's engines to become smaller, yet more powerful and efficient. The need for engines to deliver increased fuel economy, reduced emissions and high performance means they must work harder than ever before. Engines produce pressures of up to 10 tons per square centimeter. That's like five cars resting on a high heel. More pressure means more stress for the oil, more metal-to-metal contact and friction that can rob performance from your engine. Castrol EDGE is three times stronger against viscosity breakdown than the leading synthetic and leading conventional oils. The unique titanium technology physically changes the way oil behaves under extreme pressures doubling its film strength, preventing oil from breaking down and reducing friction to maximize engine performance.