Engine Oil tester Gasoline & Diesel AS503 Engine Oil Quality Tester Kit Transmittance & Temperature Analysis Detector with 800MM High Precision Probes,2.8” Backlit Display

Whether you’re a seasoned mechanic or a car enthusiast, this oil quality tester offers a reliable way to monitor your engine’s health without the hassle of costly professional inspections. With a 2-second rapid test, it quickly assesses light transmittance to detect impurities or metal particles, giving you peace of mind about your oil’s condition. The high-precision sensor probe ensures accurate readings, while the 800mm flexible PTFE hose makes it easy to use in tight engine spaces. Its 2.8-inch backlit LCD screen provides clear visibility of key metrics like transmittance and temperature, even in bright sunlight or dim environments.Designed for durability, the tester’s corrosion-resistant materials and long-term reliability make it a trusted tool for regular maintenance.
Perfect for both everyday use and professional settings, this tester is compatible with all major lubricant standards and works seamlessly with gasoline and diesel oils. Its ability to separate test results for each oil type adds an extra layer of precision, helping you make informed decisions about when to change your oil. The intuitive design, paired with a 3-year warranty and 24-hour support, ensures you’re never left without assistance. Whether you’re checking your car’s oil at home or managing a fleet, the tester’s user-amiable interface and robust build make it a practical addition to your toolkit.
- Pros: 2-second test for swift results, high-precision optical sensor, flexible hose for easy access, backlit LCD screen for clear visibility, 3-year warranty and fast support.
- Cons: Requires engine operation before testing, limited to oil analysis, may need calibration for optimal accuracy.
| Feature | detail |
|---|---|
| Test Time | 2 seconds |
| Sensor Type | High-precision optical sensor |
| Hose Length | 800mm flexible PTFE hose |
| Screen Size | 2.8-inch HD backlit LCD |
| Warranty | 3-year coverage |
| Compatibility | All major gasoline and diesel engine oils |
Engine Oil Tester Kit Gasoline & Diesel Engine Oil Quality Tester high-precision Diagnostic Analysis Tool with 31.5in Probe Transmittance/Temperature Testing, 2.8in Display (4 Batteries)

Whether you’re a seasoned mechanic or a DIY enthusiast, this engine oil tester is a game-changer for maintaining peak vehicle performance. Its dual-mode functionality allows precise analysis of both gasoline and diesel oils, identifying degradation, viscosity issues, and additive depletion with lab-grade accuracy. By diagnosing oil quality without needing to drain the entire system, users can extend oil change intervals by up to 35%, saving time and money while keeping engines running smoothly. The included 31.5-inch flexible Teflon hose ensures easy access to tight spaces, and the high-precision probe delivers instant, reliable results-making even routine checks feel like a professional service.
Designed with user convenience in mind, the tester’s 2.8-inch backlit LCD display remains legible in any lighting condition, while its ergonomic silicone grip provides a secure, one-handed hold. The auto-shutoff feature and battery level indicator eliminate the need for constant power management, ensuring hassle-free use during inspections or storage.With 4 AAA batteries included and a 36-month warranty, it’s built to withstand the demands of daily use, whether in a workshop, on a fleet, or at home. The intuitive setup and English manual make it accessible to all, while the durable, corrosion-resistant components promise long-term value for both mechanics and vehicle owners.
- Pros: universal compatibility with 95%+ lubricants, 31.5-inch flexible hose for versatility, precise temperature and light transmittance measurements, 36-month warranty, ergonomic design for one-handed use, and auto-shutoff to conserve battery life.
- Cons: Requires replacement batteries over time, limited to engine oil testing only, and may need calibration for optimal accuracy.
| Feature | Detail |
|---|---|
| Testing capabilities | degradation,viscosity,and additive depletion analysis |
| Hose Length | 31.5 inches (800 cm) for hard-to-reach areas |
| Temperature Range | -10°C to 125°C (-14°F to 257°F) |
| Battery Life | 5-minute auto-shutoff; 4 AAA batteries included |
| Display | 2.8-inch LCD with backlight for clear readings |
| Warranty | Free 36-month coverage |
AUTOOL Engine Oil tester Gasoline & Diesel Engine Oil Quality Tester Kit, quick Testing Transmittance and Temperature, with 31.5 inch Flexible Probe, 2.8-inch Backlit Display

Whether you’re maintaining a gasoline or diesel-powered vehicle, this versatile engine oil quality tester ensures compatibility with a wide range of mainstream car models.Its dual-mode functionality eliminates the need for separate tools, while the switchable °C/°F units cater to user preferences and regional standards. The real-time oil temperature display is a game-changer, providing instant feedback to help you monitor engine conditions and avoid potential overheating issues. This intuitive design makes it easy to integrate into your regular maintenance routine, offering peace of mind without the hassle of complex setup.
With a robust detection range, the tester uses advanced optical technology to measure oil transmittance from 0% to 100%, delivering clear visual indicators to assess contamination levels. The △, ×, and OK symbols simplify decision-making, empowering users to confidently determine when an oil change is necessary or if their current oil is still suitable. The lightweight, portable build ensures convenience during inspections, and its durable construction guarantees reliable performance over time. By combining precision with user-friendly features, this tool helps you stay proactive about engine health and extend the lifespan of your vehicle.
- Pros
- Dual compatibility for gasoline and diesel engines
- Real-time temperature monitoring for safety
- Clear visual indicators (△, ×, OK) for easy interpretation
- Portable and lightweight design
- Durable build for long-term use
- Switchable °C/°F units for global usability
- Cons
- Requires proper calibration for accurate results
- Learning curve for interpreting transmittance symbols
- Limited to oil quality checks, not other fluids
- No auto-off feature for prolonged use
- Accuracy may vary with extreme oil conditions
| Feature | Detail |
|---|---|
| Dimensions | 10.12 x 5.47 x 2.28 inches |
| Weight | 12.8 ounces |
| Detection Range | 0-100% transmittance |
| Temperature Units | °C/°F switchable |
| compatibility | Gasoline & diesel engines |
Seize the Possibility
AUTOOL Engine Oil Tester Gasoline & Diesel Engine Oil Quality Tester Kit, Quick Testing transmittance and Temperature, with 31.5 inch Flexible Probe, 2.8-inch Backlit Display
Key Benefit: Dual-mode adaptation for gasoline/diesel, real-time temperature display, and 31.5-inch probe for easy access.
Engine Oil Tester Kit Gasoline & Diesel Engine Oil Quality Tester High-Precision Diagnostic Analysis Tool with 31.5in Probe Transmittance/Temperature Testing, 2.8in Display
Key Benefit: 31.5-inch flexible probe for comprehensive diagnostics and user-friendly transmittance/temperature analysis.
Engine Oil Tester gasoline & Diesel AS503 Engine Oil Quality tester Kit Transmittance & Temperature analysis Detector with 800MM High Precision Probes,2.8” Backlit Display
Key Benefit: High-precision 800mm probes for accurate transmittance analysis and reliable temperature monitoring.
While lab-grade tools offer unmatched accuracy, this tester’s 3-year warranty and dual-mode functionality make it a standout choice for everyday users. Whether you prioritize durability,precision,or ease of use,the right tool can simplify your engine maintenance without compromising reliability.Choose wisely-one that balances performance with long-term value.

