

AUTOOL AS503 Engine Oil Tester Product Introduction
As people increasingly value engine protection and prioritize driving safety, engine lubricant testing has gained significant attention in the realm of automotive service. The 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.
In terms of design, the AS503 incorporates a user-friendly body design, practical configurations, and a detailed operational interface. It houses precision sensors capable of measuring fundamental parameters such as oil temperature within the engine oil, providing informative test results for reference. On the whole, the AS503 offers practical functionality and a well-thought-out design, providing a simpler and more efficient solution for engine oil testing in the automotive aftermarket.
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 50%,there is no need to change engin oil.when the transmittance is between 50% 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.
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.
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.
























Fast shipping, product as described. I recommend the seller.
Thank you seller!!! Perfect!
Well-made, no batteries included. Testing in a practically new engine with new oil and measuring the oil in the pan showed 100%. I haven't had the chance to measure used oil yet.
It works well.
The device is very professional, with its respective certificate of authenticity and quality; it is excellent.
It arrived on time and in good condition, very well protected, it works with 4 AAA batteries not included, it will need to be put into operation.
I have tested it with both new and used oil, and it seems to have good values.
The truth is, an excellent product, I really like it; it fulfills what was promised.
Excellent service, well packaged, and everything arrived in good condition.
Great seller, very fast delivery, great product. Thanks
Fast shipping, well packaged, without batteries, uses 4 AAA units, yet to test it to draw conclusions.
The device arrived quite quickly. The workmanship is high-quality, the material feels and looks good, you wouldn't even tell it's Chinese :). I didn't test the oil. Everything works fine.
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.
Great device. It's worth having something like this.
Excellent results with the engine oil tester. I tested it on a diesel and a gasoline vehicle. I attach photos of the result.
Excellent tool, needs to be tested, looks made of very good material.
The product is working great. Thanks to the seller.
Thank you! big device 🙂 🙂 🙂