AUTOOL Engine Oil Tester with Digital Display for Auto Check Gasoline & Diesel Car Engine POA Oil Quality Repair Tools AS503

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Product Details

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.

 

Item Specifics
High-concerned chemical:
None
Electronic:
No
Model Number:
AS503
Reviews
(19)
Verified Buyer
Customer
15 Mar 2026 00:00

Fast shipping, product as described. I recommend the seller.

Verified Buyer
Customer
14 Mar 2026 00:00

Thank you seller!!! Perfect!

Verified Buyer
Customer
16 Feb 2026 00:00

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.

Verified Buyer
M***n
17 Jan 2026 00:00

It works well.

Verified Buyer
v***r
8 Jan 2026 00:00

The device is very professional, with its respective certificate of authenticity and quality; it is excellent.

Verified Buyer
J***A
23 Dec 2025 00:00

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.

Verified Buyer
Customer
18 Dec 2025 00:00

I have tested it with both new and used oil, and it seems to have good values.

Verified Buyer
t***o
10 Dec 2025 00:00

The truth is, an excellent product, I really like it; it fulfills what was promised.

Verified Buyer
Customer
10 Dec 2025 00:00

Excellent service, well packaged, and everything arrived in good condition.

Verified Buyer
S***v
18 Nov 2025 00:00

Great seller, very fast delivery, great product. Thanks

Verified Buyer
Customer
5 Nov 2025 00:00

Fast shipping, well packaged, without batteries, uses 4 AAA units, yet to test it to draw conclusions.

Verified Buyer
S***r
2 Nov 2025 00:00

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.

Verified Buyer
O***b
17 Oct 2025 00:00

Works very good. The tool checks the fresh motoroil in my ford kuga phev with 100 % quality.

Verified Buyer
Customer
17 Oct 2025 00:00

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.

Verified Buyer
P***m
9 Oct 2025 00:00

Great device. It's worth having something like this.

Verified Buyer
M***s
30 Aug 2025 00:00

Excellent results with the engine oil tester. I tested it on a diesel and a gasoline vehicle. I attach photos of the result.

Verified Buyer
M***o
22 Aug 2025 00:00

Excellent tool, needs to be tested, looks made of very good material.

Verified Buyer
A***n
22 Jul 2025 00:00

The product is working great. Thanks to the seller.

Verified Buyer
e***a
15 Jul 2025 00:00

Thank you! big device 🙂 🙂 🙂

Shipping & Returns

SHIPPING

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have been shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 15-40 Business days
Canada, Europe 15-40 Business days
Australia, New Zealand 15-40 Business days
Central & South America 15-40 Business days
Asia 15-30 Business days
Africa 15-40 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

RETURNS

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.

Refunds

Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of car accessories (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://www.carforaccessories.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.

Exchanges

If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Why Buy From Us

A few reasons why buy from us:

SAFE SHOPPING

We try our best to make your shopping experience not only pleasant, seamless and hassle-free, but also secure.

FREE SHIPPING

Enjoy flexible international shipping services that currently operate in over 200 countries across the world.

NEW ARRIVALS

Brand new products are available on a regular basis.

PRICE PROMISE

We don't want you to choose between the best value and the best service. That's why we offer competitive pricing.

EXCELLENT CUSTOMER SERVICE

Knowledgeable and professional support team is always happy to help you.

EASY TRACKING

Check your order status online. As easy as that!

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