Anceaux AMSOIL engine oil classification &; #8226; OE series (including OEZ 0W-20, OEM 5W-20, OEF 5W-30, OET 10W-30) have a service life of 5000 kilometers or 4 months &; #8226; XL series (including XLZ 0W-20, XLM 5W-20, XLF 5W-30, XLT 10W-30, XLO 10W-40), service life 1 10,000 km /6 months & # 8226; Signature series (including ASM 0W-20, AZO 0W-30, ALM 5W-20 ASL 5W-30, ATM 10W-30) have a service life of 20,000 kilometers or one year &; #8226; High-performance durable series (including AMO 10W-40, ARO 20W-50 &；; #8226; European car series (including AEL 5W-30 and AFL 5W-40), service life: follow the maintenance mileage and time specified by the original factory &; #8226; Z-Rod high-performance engine oil (including ZRT 10W-30 and ZRF 20W-50), life: 5000km &；; #8226; Racing engine oil (including RD20, RD30, RD50, etc. ) Suitable for all kinds of racing engines.