Repair testing / 8 sub-categories
Automotive Repair & Testing Equipment
Diagnostic tools for leak tracing, visual inspection, battery health, circuits, pressure, spark, oil, and electrical readings.
Repair maintenance / 6 sub-categories
Automotive Repair & Maintenance Equipment
Service equipment for fluid exchange, A/C diagnostics, refrigerant recovery, oil handling, and cooling-system work.
Carbon cleaning / 3 sub-categories
Carbon Deposit Cleaning Equipment
Carbon-removal equipment for injectors, intake valves, components, and workshop cleaning jobs.
Wheel tire / 3 sub-categories
Wheel and Tire Repair Equipment
Equipment for alignment, lifting, tire repair, tire mounting, and service-bay workflows.
Tool storage / 1 sub-category
Workshop Tool Storage Series
Storage products for keeping workshop tools, test equipment, and accessories organized.
EV charging / 1 sub-category
Electric Vehicle Charger Series
EV charging products for new-energy vehicle service, workshop use, and installation scenarios.
OBD diagnosis / 4 sub-categories
OBD Diagnostic Tools
OBD-related testers, cable products, used-car inspection tools, and key frequency diagnostics.
Accessories / 8 sub-categories
Accessories
Replacement parts, adapters, consumables, cables, and add-ons for major diagnostic and service equipment.







































Heiszler –
I just got my package! I will test it and come back with feedback
S¨¦rgio Brand?o (verified owner) –
Very quickly, good material.
Brian Cook (verified owner) –
I really appreciate being able to use this engine oil tester. The technology is amazing to me. There are a few changes I would make to the device. The probe should be slightly longer. I had to push the probe in all the way to the handheld unit to get an accurate test result. The metal tip of the probe could be improved. The sharp metal edges need to be smooth so that they don’t cause the probe to become stuck. It wasn’t easy for me to remove the probe every time.
Dariusz Kr¨®l (verified owner) –
Kolejne przydatne urz?dzenie tej firmy jest bardzo pomocne w moim domowym warsztacie przy obs?udze samochodu. Polecam
Adam Piatczak (verified owner) –
Very good product. High recommended !
Osborn Bentham –
This engine oil tester can clearly detect the transmittance of the oil, the display is clear and crisp, very good to use£¡Trust AUTOOL’s quality!
Bruce T Elwell –
Bought this to check my oils condition on my car also for my oil cooler. If the oil temperature ever rises too high I know this will need to be changed
Bernard Pathirana (verified owner) –
AUTOOL AS503 Engine Oil Tester with Digital Display for Auto Check Gasoline & Diesel Car Engine POA Oil Quality Repair Tools
Serban Bogdan (verified owner) –
Nice product, I can say in new oil 100% corect, in used one 9000km on disel car used oil 30% remaining but it’s not seeing the oil it’s polluted with diesel , and probably the friction it’s more bad for the engine .
Ethel Horace –
The tool is very useful, the check is very accurate, helped me to solve many ware quality problems, effectively improve the power of the car!
Makis (verified owner) –
Exactly how it was described..,excellent service!!!
I will buy again
herry –
I’m really impressed with this tester because it enables me to test multiple specific types of DOT brake fluid. Compared to those small pencil – type brake fluid testers, this meter is significantly more accurate.
Cash Yonng –
Exceeded my expectations! The operation is very simple, just insert the probe into the oil and it shows the health of the oil in a few seconds, making it easy for me to determine if I need to change the oil.
The measurement results are very intuitive, the green light means the oil is in good condition, the yellow light reminds that attention is needed, and the red light indicates that it’s time to change the oil, which is very practical! I used it to test several cars of my own and my friends’, and the results were very accurate, greatly reducing the cost of unnecessary oil changes.
jrpete –
Try it if it’s accurate and. Good item.
Richard –
Okay good. Hope it will last. Having the tool makes working more confident. Garage guys should buy and use it.
Enrique Hernandez (verified owner) –
What I don’t like is that an oil with 6k miles and a fairly dark color says it has 100% life…
Betty Chaucer –
The operation is simple, the detection is accurate, and the detection time is short. It can be measured in just a few seconds.
ville chen –
Good product, shows that it is of very good quality compared to what it costs, works very well.
Clement Nathaniei –
This AUTOOL AS503 engine oil tester is really useful! It only takes a few seconds to determine if the oil should be replaced, no more feeling or blindly changing the oil, saving money and the environment. It’s very easy to operate, plug in the power, plug in the probe, and the readings are clear at a glance, making it suitable for individual car owners as well as maintenance stores.
Nikolai Marinov (verified owner) –
Super
Oliver Woolf –
I compared it with other brands’ testers, and it delivers accurate results with fast detection speed. The product feels premium and is very easy to use.
Thettalos (verified owner) –
I think it works for real!