Shell Helix Ultra Professional AV-L 0W-20 is a fully synthetic engine oil designed to meet the specific requirements of engine manufacturers. It is ideal for heavy-duty Audi, Volkswagen and Porsche engines, offering them the highest quality protection. The oil is colored green, which makes it easy to identify, especially when using different oils. Shell Helix Ultra Professional AV-L 0W-20 is designed for petrol and diesel engines that require oils that meet the most advanced VW 508.00/509.00 standard.