Suitable for API GL-4, MB-Approval 235.1, ZFTE-ML 17A Castrol TRANSMAX Manual EP 80W is a mineral oil based fluid featuring anti-wear and load carrying properties to extend the life of components. It protects against deposit formation and oil thickening due to its high thermal stability, helping to maintain the life and performance of lubricants and transmission. Suitable for use in applications where API GL-4 performance is required and approved for use in Mercedes-Benz vehicles requiring MB 235.1 approval & ZF manual transmissions. TRANSMAX Manual EP 80W is registered under the following ZF approval numbers: ZF004862 High thermal stability protects against deposit formation and oil thickening maintaining the life and performance of lubricant and transmission