AUTOOL AS503 Engine Oil Tester with Digital Display for Auto Check Gasoline & Diesel Car Engine POA Oil Quality Repair Tools
AUTOOL AS503 Engine Oil Tester is a specialized oil testing device tailored for the automotive inspection and maintenance sector. Its primary function involves measuring the transparency of engine oil within gasoline or diesel engines. This measurement reflects the presence of impurities and contaminants within the oil. Consequently, it assesses the quality and performance of engine oil, effectively preventing potential engine issues and malfunctions, thereby ensuring the engine operates normally and efficiently.




AUTOOL AS503 Engine Oil Tester Features:
【Optical Principle Precision Test】Auto Oil Quality Check,The 2.8 Inchs LED display can accurately display the results and the readings are clearer.Use the optical principle to check the engine oil condition,with a clear display for efficient operation even in varying lighting conditions,be it bright daylight or dim nighttime.Use the optical principle to check the engine oil condition and get the latest oil condition in anytime and anywhere.get the latest oil condition in anytime and anywhere.
【Sound Alarm】when the transmittance is between 100% and 60%,there is no need to change engin oil.when the transmittance is between 60% and 30%,an exclamation mark will be displayed on the screen to remind you to change the engin oil. when it isbelow 30%.the engin oil tester will emit a “beep”alarm to remind you to change the engin oil immediately to ensure safety.[ T] to indicate the current oil measurement temperature.
【Premium Quality】The body’s handheld portion is lined with silicone substrate,providing excellent grip & lightweight design for easy single-handed operation. The 800mm long probe designoffers a more flexible & convenient way ofconducting tests.The hose is made of PTFE material,highly resistant to oil&oxidation,and boasts exceptional corrosionresistance, effectively extending the product’s lifespan.

Operation steps:
1.wipe the test probe clean
2.remove the oil dipstick
3.press the ↶ button to select the vehicle’s engine type
4.submerge the testing probe into the engine oil
5.press the ►buteon to start the test
6.the interface will display the test results

Oil Temperature Measurement:
Built-in temperature sensor measures and displays the actual oil temperature, reflecting the engine’s operational status and load. Ensures measurement results are within the normal working temperature range.

Compatible with Various Lubricant Oil Standards:
Suitable for the majority of gasoline and diesel engine lubricant oils available in the market. Separate sampling and measurement for gasoline and diesel engines allow for more precise assessment of lubricant oil health.

Flexible Hose Probe for Convenent Testing:
The 800mm long probe design offers a more flexible&convenient way ofconducting tests. The hose is made of PTFE material, highly resistant to oil&oxidation, and boasts exceptional corrosion resistance, effectively extending the product’s lifespan.

High-pregision Optical Probe:
Integrated with a high-precision optoelectronic sensor, ensuring more accurate measurement results.

Large LCD with High Definition:
Equipped with a backlit 2.8-inch LCD screen, providing users with a clear display for efficient operation even in varying lighting conditions, be it bright daylight or dim nighttime.

User-friendly Handheld Design:
The body’s handheld portion is lined with silicone substrate,providing excellent grip & lightweight design for easy single-handed operation.

Why Choose the AUTOOL Automotive Engine Oil Tester?
The AUTOOL Automotive Engine Oil Tester is a professional tool designed for the automotive maintenance field. It is capable of measuring parameters like engine lubricant transparency and oil temperature. This device stems from AUTOOL’s independent research and development, boasting several intellectual property rights. Moreover, it has received authoritative certifications from organizations like CE, FCC, and ROHS.
Since engine oil play a key role in lubrication, cooling, rust prevention, cleaning, sealing, and buffering, using the AUTOOL Car Engine Oil Tester can effectively prevent engine issues and breakdowns. Through simple testing procedures, users can obtain accurate lubricant quality analysis and maintenance recommendations, ensuring the engine operates efficiently and extending its lifespan.





















I tried it on two cars. cold engine and second hot engine I need to test it again.
I watched a video on YouTube and bought something similar to use in the field, even tried it on my wife's car, and it seems reliable. As expected, maybe because cargo trucks are managed carelessly, it came out to be about 80% defective, haha.
Good quality, good finish, and precision in its reading. good seller, reliable and punctual
Everything is fine.
Excellent service, well packaged, and everything arrived in good condition.
Thank you very much for the order.
Works very good. The tool checks the fresh motoroil in my ford kuga phev with 100 % quality.
Looks good, fast delivery. Did not test it yet. It uses 4 small aaa 1.5v dry batteries (not included). Seems to be easy to use. Allows to select temperature units between f and c, as well as engine fuel type between gasoline and diesel. Will report additional review after using it.
Excellent
Excellent results with the engine oil tester. I tested it on a diesel and a gasoline vehicle. I attach photos of the result.
Good
Just arrived, haven't checked for functionality yet. I will provide a more detailed response later. So everything looks great!
Thank you! big device 🙂 🙂 🙂
It tells you when to change the oil, very functional, 100% recommended.
It looks fine. Tested on fresh oil and in the oil pan during 10,000 kilometers (new car, after the second oil change). You need to buy 4x AAA batteries.
Spectacular tool, I have already tested it, and it works very well. The delivery was fast, 100% recommended.
Looks solid. The cap on the battery is fixed with a metal screw into a metal socket, but the head has a spline, convenient for a screwdriver or coin or plate near the working area. There is a certificate for a 3-year warranty upon authorized purchase. I haven't tried it yet in real work because the manual doesn't write exactly how to clean the head on the sonde between tests. You still need to first watch the clip on the manufacturer's video channel.
This is a very useful tool that can measure car engine oil health, and the package arrived very safely and well-packed. 👍 🚗 💯 The tool is unbeatable and a must-have item for your cars, especially if you have multiple cars to take care of. 👍 🥇 🏆 Definitely recommended. 💯 ✅
Same as the photo, I haven't tried it yet but it looks identical. Now we just need to test it, but it's the same as the photo.