CASTROL EDGE FOR BEST CAR AND CAR WITH HIGH PERFORMANCE (The perfect perfect synthetic oil from Castrol is now better) Castrol EDGE with Titanium Fluid Strength Technology (FST) is Castrol's most powerful and sophisticated oil from other Castrol engine oil types. With Titanium liquid content, Castrol EDGE is a car oil with unique strength to reduce metal to metal direct contact. As the best car oil, Castrol EDGE is also able to reduce friction-friction on the engine and able to maximize the performance of your car engine.