Castrol EDGE Euro 5W-40 A3/B4 is an advanced full synthetic motor oil engineered to exceed manufacturer test limits ensuring the highest level of protection and maximum performance for European cars. 
European car manufacturers create unique motor oil specifications to ensure the lubricant can withstand the intense pressure, heat and friction generated in a high output engine. To ensure compliance, rigorous engine tests are developed, with approval granted only when the oil achieves the minimum values required in each test.  Castrol EDGE Euro Car fluids are formulated to exceed these requirements and deliver maximum protection and performance.