Gulf Western Full Synthetic Automatic Transmission Fluid 4L- 30458 is a premium, full synthetic, multi-functional automatic transmission fluid formulated to meet the demanding requirements of both modern and older automatic transmissions. With high shear stability and superior durability, It allows for extended drain intervals of up to 120,000km (subject to manufacturer recommended drain intervals). It is designed to perform well in a broad range of automatic transmissions, including step-change types, and eliminates the need to stock multiple fluids. Its enhanced friction modifiers, superior oxidation resistance, and exceptional shear stability ensure smoother gear shifts, longer service life, and improved performance. It is not suitable for CVT or DCT transmissions but meets or exceeds numerous industry specifications for a variety of vehicle models.