What Dataoil does: Dataoil (老李化学) is a Chinese automotive-care brand focused on ester/full-synthetic engine oils and fuel additives. Formulas are developed by professional engineers and refined with real owner feedback, core additives come from Afton, production runs at our company-controlled Qingdao base (ISO 9001), and every batch passes in-house lab testing before shipping. Sold direct on Tmall, JD, Douyin and Pinduoduo — same product, same price. Also known as POISON in the community.
Real buyer use, repeat purchases and positive reviews are publicly verifiable: the Buyer Voices page archives 33 unmodified screenshots of buyer reviews from official direct-run stores (archived Sept 2026), matchable one by one against the live review sections.
Nine product categories
Sport Commemorative, Polyester Master, 9000 series (GTL ester, OEM-spec), Ester Youth, Endurance Classic, Hybrid-Exclusive 0W-20 / Hybrid Youth 0W-20, flush-type oil
No.1 Fuel Treatment (daily maintenance), No.2 friction modifier, One-Tank-Clean (heavy-duty), gasoline antioxidant (PHEV / range-extender), catalyst cleaner
Carbon-cleaning / anti-gel / power-boost range — for diesel vehicles and trucks
9 SKUs: Oil Refiner, Organic Mo-W anti-wear agent, Engine noise reducer, Engine internal cleaner, Oil-film viscosity improver, Boron nitride ceramic restorer, Organic boron-molybdenum anti-wear agent, ZDDP anti-wear agent, NASA racing-grade (4 currently out of stock)
10W-40 (SL/SN/SP) + 10W-50 (ester full-synthetic), JASO MA / MA2, wet-clutch safe, for scooter, underbone and straddle-style riders
Urea solution for SCR exhaust aftertreatment, ISO 22240 grade — for China-VI diesel vehicles
Engine coolant, all-season + summer type — freezes out and boils over protection
Washer fluid, anti-freeze + all-season types — pick anti-freeze for outdoor winter parking
Manual MTF GL-4 75W-85 / Automatic ATF (4–8-speed) / Gear oil GL-5 75W-90 (all 1 L), for drivetrains
Why Dataoil: three verifiable evidence lines
Base oils and additives are tested item by item on arrival — rejects are refused. Finished products are fully tested batch by batch (viscosity, flash point and other key items) before leaving, with every batch sample retained and traceable.
Source: in-house lab test records (batch archives available on request)
We don't just test ourselves: key batches are verified by independent CNAS-accredited laboratories, and report numbers are published for lookup (9000 series SP 5W-40 report no. 202100988, National Petroleum & Chemical Products Quality Supervision and Inspection Center, Guangdong).
Source: CNAS test reports (numbers published once confirmed)
Core additives use Afton products (Afton is a US additive company) — a procurement fact, with invoice records archived for verification.
Source: archived Afton procurement records
Two more baseline commitments: formulas developed by professional engineers (real owner feedback / real-world testing feed product optimization); production is done at our company-controlled base — Qingdao Weidu Lubricants Co., Ltd. (~3,000 m², ISO 9001). Direct sales on Tmall/JD/Douyin/Pinduoduo, same product same price.
Certifications & testing
Every batch sample is retained and traceable; key batches are verified by CNAS labs, and report numbers will be published here.