1. Introduction
The AUTOOL AS503 Engine Oil Tester is a specialized device designed for automotive inspection and maintenance. Its primary function is to measure the transparency of engine oil in both gasoline and diesel engines. This measurement helps assess the presence of impurities and contaminants, providing insight into the oil's quality and performance. By using the AS503, you can effectively prevent potential engine issues and malfunctions, ensuring optimal engine operation and efficiency.
The device utilizes an optical principle for precise testing and features a clear 2.8-inch backlit LCD for easy readability in various lighting conditions.
2. Key Features
- Optical Principle Precision Test: Utilizes an optical principle to check engine oil condition, providing accurate results.
- Digital Display: 2.8-inch backlit LCD screen for clear display of results, readable in bright daylight or dim nighttime.
- Sound Alarm: Alerts the user when oil transmittance falls below 30%, indicating an immediate need for oil change.
- Oil Temperature Measurement: Built-in temperature sensor measures and displays actual oil temperature in °C or °F, reflecting engine operational status.
- Wide Compatibility: Suitable for the majority of gasoline and diesel engine lubricant oils.
- Flexible Hose Probe: An 800mm long probe made of PTFE material, highly resistant to oil and oxidation, for convenient testing.
- User-Friendly Handheld Design: Silicone-lined for excellent grip and lightweight for single-handed operation.
3. Safety Information and Cautions
Please read and understand the following safety information before using the AUTOOL AS503 Engine Oil Tester.
- Oil Extraction: In cases where the oil filler cap of certain vehicle models does not allow direct insertion of the testing probe, it is necessary to extract a portion of the engine oil from the vehicle before conducting the test.
- Incompatible Substances: This product relies on optical detection probes to analyze the particulate content in oil. As a result, it is not suitable for analyzing automotive engine oils containing components such as molybdenum disulfide (MoS₂), organic molybdenum, graphene, and similar substances.
4. Setup
The AUTOOL AS503 is powered by 4 x 1.5V batteries. Ensure fresh batteries are installed in the battery compartment located at the back of the device (refer to Figure 4, point G for battery cover location).
5. Operating Instructions
Follow these steps to accurately test your engine oil:
- Wipe the Test Probe Clean: Before each use, ensure the probe tip (A in Figure 4) is thoroughly cleaned to prevent contamination and ensure accurate readings.
- Remove the Oil Dipstick: Locate and remove the engine oil dipstick from your vehicle.
- Select Engine Type: Press the ↶ button (D in Figure 4) to toggle and select the correct engine type (Gasoline or Diesel) on the display (B in Figure 4).
- Submerge the Testing Probe: Carefully insert the probe into the engine oil through the dipstick tube or into an extracted oil sample. Ensure the probe tip is fully immersed in the oil.
- Start the Test: Press the ► button (E in Figure 4) to initiate the oil quality test.
- View Results: The interface will display the test results, including oil transmittance percentage and temperature.
Understanding the Display
The 2.8-inch LCD provides comprehensive information:
- Battery Level: Indicates the remaining battery power.
- Oil Type: Shows whether 'Gasoline' or 'Diesel' engine oil is selected.
- Analog Bar Graph: Visually represents the oil transmittance percentage.
- Temperature of Engine Oil: Displays the current oil temperature.
- Transmittance of Engine Oil: Shows the percentage of light transmitted through the oil, indicating its clarity and quality.
- Backlight Indicator: Shows the status of the display backlight.
Transmittance Indicators:
- 100% OK: Oil quality is good, no change needed.
- 40% Warning: Oil quality is degrading, consider changing soon.
- 10% Suggested Replacement: Oil quality is poor, immediate replacement is recommended.
Additional Functions
- Temperature Unit Switching: Press the °C/°F button (C in Figure 4) to toggle between Celsius and Fahrenheit temperature units.
- Backlight Control: Press the */ button (F in Figure 4) to turn the backlight on or off. A long press of this button will turn the entire tester on or off.
Video 1: AUTOOL AS503 Engine Oil Tester in operation, demonstrating the testing process and display features.
6. Maintenance
- Probe Cleaning: Always wipe the test probe clean before and after each use to ensure accurate readings and prevent cross-contamination.
- Battery Replacement: When the battery level indicator shows low power, replace the four 1.5V batteries in the battery compartment.
- Storage: Store the device in a dry, cool place away from direct sunlight and extreme temperatures.
- General Care: Avoid dropping the device or exposing it to harsh chemicals. Clean the exterior with a soft, damp cloth.
7. Troubleshooting
- Inaccurate Readings: Ensure the probe is clean and fully submerged in the oil. Verify that the correct engine oil type (Gasoline/Diesel) is selected. Ensure the oil temperature is within the operating range.
- No Display/Power: Check battery installation and ensure batteries are not depleted. Long press the power button (*/ button) to turn on the device.
- Oil Transmittance Warning: If the device displays a warning or suggests replacement, it indicates that the oil quality has degraded significantly. It is recommended to change the engine oil promptly.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | AS503 |
| Type | Test Instruments |
| Working Voltage | 6V (4 x 1.5V batteries) |
| Working Temperature Range | -10℃ ~ 60℃ |
| Detection Time | 16 seconds |
| Size | 72mm x 29mm x 175mm (2.8 x 1.1 x 6.9 inches) |
| Weight | 0.3kg |
| Probe Length | 800mm |
| Display | 2.8-inch Backlit LCD |
| Certification | CE |
9. User Tips
- Optimal Testing Time: For the most accurate results, test the engine oil after it has cooled down following a trip, rather than immediately after operation or after several days of inactivity. This allows contaminants to settle and provides a more representative sample.
- Regular Checks: Incorporate regular oil quality checks into your vehicle maintenance routine to proactively monitor oil degradation and prevent potential engine damage.
10. Warranty and Support
The AUTOOL AS503 Engine Oil Tester comes with a 3-year warranty from the AUTOOL authorized store, ensuring commitment to product quality and customer satisfaction.
For technical support, troubleshooting assistance, or warranty claims, please contact your authorized AUTOOL dealer or visit the official AUTOOL website for further information.
