Aisin Warner WS

The Aisin Warner WS specification is a technical standard developed by the Japanese transmission manufacturer Aisin Warner that defines requirements for automatic transmission fluids (ATF) for a wide range of gasoline, diesel, turbocharged and hybrid engines equipped with Aisin gearboxes, including CVT and traditional planetary units. The main parameters of WS are controlled viscosity in the range 5W‑30 – 10W‑40, high thermal stability, oxidation resistance and provision of stable friction characteristics, which guarantee smooth gear shifts and protection of gears and seals. The standard provides compatibility with low‑emission systems, including catalysts and DPF, thanks to low SAPS content, allowing avoidance of particulate filter contamination. The specification is targeted at transmissions installed in vehicles of the Toyota, Lexus, Nissan, Hyundai, Kia and other brands that use Aisin‑produced gearboxes, ensuring durability and reliable operation under high loads. When selecting a product marked AISIN WS in the XENUM catalog, technicians and drivers receive the guarantee that the oil meets all OEM requirements for transmission fluids, delivering optimal performance and protection.