AUTOOL AS503 Engine Oil Quality Tester | Professional Oil Analysis Tool

AUTOOL AS503 Engine Oil Quality Tester for Petrol & Diesel Vehicles

Professional Oil Analysis Tool

The AUTOOL AS503 Engine Oil Quality Tester is a professional diagnostic tool designed to assess the condition of engine lubricating oil quickly and accurately. Using advanced optical sensing and digital analysis technology, it measures oil transmittance and temperature to identify contamination, degradation and wear-related impurities. Suitable for both petrol and diesel engines, the AS503 provides clear recommendations on oil condition, helping workshops and vehicle owners make informed maintenance decisions, reduce engine wear, improve reliability and extend engine service life.

AUTOOL AS503 engine oil quality tester for automotive diagnostics

Main Features

High-Precision Oil Quality Analysis – Utilises advanced optical sensing and digital analysis technology to accurately evaluate engine oil condition by measuring oil transmittance and detecting contamination, ageing and wear-related impurities.
Dual Engine Compatibility – Supports both petrol and diesel engine lubricants, making it suitable for workshops, fleet operators and vehicle owners servicing multiple vehicle types.
Oil Temperature Monitoring – Features an integrated temperature sensor that measures engine oil temperature in real time, helping ensure more accurate testing and assessment results.
Rapid Testing Results – Provides oil quality analysis within seconds, reducing diagnostic time and enabling faster maintenance decisions.
HD Backlit LCD Display – Equipped with a clear 2.8-inch LCD screen that delivers excellent visibility in both bright workshop conditions and low-light environments.
Intelligent Maintenance Recommendations – Automatically provides easy-to-understand results such as Continue Using, Recommended Replacement or Immediate Oil Change, eliminating guesswork.
Flexible PTFE Probe System – Includes an 800mm PTFE probe hose offering excellent resistance to oil, oxidation and corrosion while providing convenient access during testing.
Portable Workshop Design – Compact and lightweight construction makes it ideal for mobile technicians, roadside inspections and workshop environments.
Supports Preventative Maintenance – Identifies deteriorating oil before it contributes to excessive engine wear, helping reduce maintenance costs and improve reliability.
Durable Professional Construction – Built with quality components and a high-precision processing chip for dependable performance in demanding automotive environments.

Package Includes

1 × AUTOOL AS503 Engine Oil Quality Tester
1 × Flexible 800mm PTFE Probe
1 × User Manual
1 × Storage Box
4 × AA Batteries (depending on package configuration)

Professional Engine Oil Analysis & Condition Monitoring

Advanced optical oil quality testing

Suitable for petrol and diesel engines

Measures oil transmittance and temperature

Fast results within seconds

HD backlit LCD display

Intelligent oil replacement recommendations

Flexible 800mm PTFE probe hose

Compact and portable design

High-precision digital analysis

Helps extend engine life

AUTOOL AS503 professional oil condition testing tool

AUTOOL AS503 Engine Oil Tester Specifications

Model: 8~30V

Current Measurement Range: AUTOOL AS503

Product Type: Engine Oil Quality Tester

Testing Technology: Optical Sensing & Digital Analysis

Supported Engines: Petrol & Diesel

Display: 2.8" HD LCD Backlit Screen

Operating Voltage: 6V (4 × 1.5V AA Batteries)

Oil Temperature Measurement: Yes

Probe Hose Length: 800mm

Hose Material: PTFE

Operating Temperature: -10°C to 60°C

Test Result Display: Numerical Values & Maintenance Recommendations

Recommended Oil Testing Interval: 5000-1W kilometers

Portability: Compact Handheld Design

Certifications: CE, FCC, RoHS

AUTOOL AS503 automotive maintenance diagnostic device

Delivery

99% of purchases are dispatched from our Melbourne warehouse within 24 hours of payment. Every parcel is shipped with Australia Post e-Parcel, complete with tracking and signature on delivery.

Need it sooner? Express shipping is also available—check if your postcode is in the Next Day Delivery network.

Returns

Shop with confidence. We offer a 30-day money back guarantee on all orders. If you’ve had a change of mind, simply return the item in re-original condition and we’ll make it right.

Warranty

All AZscanners products are backed by a 12-month warranty (unless otherwise stated). We stand by the quality of our tools and will repair or replace your item if a covered fault arises.

Buying your scan tool should feel easy, safe, and backed by a team you can trust.

That’s why thousands of mechanics, fleets, and car owners across Australia choose AZscanners. Here’s our promise to you:

Trusted Since 2013

We’ve been Australia’s go-to supplier of premium diagnostic scan tools for over a decade. From workshops and mobile mechanics to DIY users, we’ve built our reputation on quality, reliability, and real support.

30-Day Money Back Guarantee

Changed your mind? No problem. You have 30 days to return your item in its original condition for a full refund. It’s our way of making your purchase completely risk-free.

Quality You Can Count On

Every product in our range is hand-picked for performance, compatibility, and durability. Whether you’re after a professional-grade scan tool or an easy solution for home use, we’ve got you covered.

Local Support that Cares

We don’t just sell scan tools — we support them. Our team of technicians is here to answer your questions before and after purchase, so you’re never left on your own.

Fast & Reliable Shipping

99% of orders are shipped within 24 hours (from our Melbourne warehouse) with tracking and signature included. Need it quicker? Express delivery is available.