









🔧 Stay ahead of engine wear with precision you can trust!
The QPKING AS503 Engine Oil Quality Tester is a professional-grade handheld device designed for both gasoline and diesel engines. Featuring a high-precision optical sensor, an 800mm flexible PTFE probe, and a 2.8-inch backlit LCD screen, it delivers accurate oil quality and temperature readings. Its ergonomic design and robust build, combined with a 3-year warranty and lifetime maintenance, make it an essential tool for proactive engine health monitoring.








| Manufacturer | QPKING |
| Brand | QPKING |
| Package Dimensions | 25.5 x 14.2 x 5.89 cm; 372 g |
| Manufacturer reference | AS503 Motoröl-Qualitätsprüfgerät |
| Item Weight | 372 g |
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