AISIN 1A

AISIN 1A is a technical standard developed by Aisin Warner for engine oils used in gasoline and light‑diesel engines, including turbocharged and hybrid variants with CVT. The specification requires stable viscosity in the range 0W‑20…5W‑30, high oxidation resistance, wear protection and cylinder cleanliness, achieved by using synthetic ester base oils and the presence of corrosion inhibitors. Oils that meet AISIN 1A are compatible with low‑emission systems, including catalysts and DPF, without elevated levels of sulfate, aromatic and phosphorus compounds (SAPS‑free). This standard is commonly used in Toyota, Lexus, Suzuki and other OEM models that demand fuel economy and long‑lasting protection under high loads. When choosing XENUM products, the AISIN 1A mark guarantees that the oil meets all Aisin requirements and will provide stable engine operation throughout the entire service interval.