---
product_id: 670866587
title: "Engine Oil Quality Tester AS503 Engine Oil Tester for Petrol and Diesel Vehicles with 2.8-Inch Screen, High-Precision Detection Probe, Transmission Oil Temperature Display"
brand: "qpking"
price: "₩212691"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/670866587-engine-oil-quality-tester-as503-engine-oil-tester-for-petrol
store_origin: KR
region: South Korea
---

# High-precision optical probe 2.8-inch high-res screen Real-time oil temperature display Engine Oil Quality Tester AS503 Engine Oil Tester for Petrol and Diesel Vehicles with 2.8-Inch Screen, High-Precision Detection Probe, Transmission Oil Temperature Display

**Brand:** qpking
**Price:** ₩212691
**Availability:** ✅ In Stock

## Summary

> 🔧 Diagnose Like a Pro, Drive with Confidence!

## Quick Answers

- **What is this?** Engine Oil Quality Tester AS503 Engine Oil Tester for Petrol and Diesel Vehicles with 2.8-Inch Screen, High-Precision Detection Probe, Transmission Oil Temperature Display by qpking
- **How much does it cost?** ₩212691 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/670866587-engine-oil-quality-tester-as503-engine-oil-tester-for-petrol)

## Best For

- qpking enthusiasts

## Why This Product

- Trusted qpking brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Peace of Mind Guaranteed:** Backed by a 24-month warranty and 24/7 customer support to keep your diagnostics seamless and stress-free.
- • **Ergonomic & User-Friendly:** Silicone-lined handheld design ensures a secure grip and lightweight one-handed operation for busy professionals.
- • **Precision at Your Fingertips:** High-precision optoelectronic sensor delivers ultra-accurate oil quality readings for both petrol and diesel engines.
- • **Stay Ahead with Real-Time Data:** Built-in temperature sensor displays transmission oil temperature, enabling proactive engine health monitoring.
- • **Flexible Testing, Maximum Comfort:** 800mm PTFE hose probe offers exceptional corrosion resistance and effortless maneuverability during tests.

## Overview

The QPKING AS503 Engine Oil Quality Tester is a cutting-edge diagnostic tool designed for petrol and diesel vehicles. Featuring a 2.8-inch screen and a high-precision optical probe, it provides accurate oil quality assessments and real-time transmission oil temperature readings. Its flexible 800mm PTFE hose probe ensures durability and ease of use, while the ergonomic handheld design offers comfort during testing. Supported by a 24-month warranty and round-the-clock customer service, this tester empowers professionals to maintain optimal engine performance with confidence.

## Description

Full description not available

## Features

- Compatible with various lubricating oil standards: suitable for most lubricating oils available on the market for petrol and diesel engines. Separate sampling and measurements for petrol and diesel engines allow a more accurate assessment of the condition of the lubricating oil.
- Oil temperature display: built-in temperature sensor for convenient assessment of the operating status of the engine.
- High-precision optical probe: integrated with a high-precision optoelectronic sensor that ensures more accurate measurement results.
- [FLEXIBLE HOSE PROBE FOR COMFORTABLE TESTS]: The 800mm long probe design provides a more flexible and convenient way to perform tests. The hose is made of PTFE material, which is very oil and oxidation resistant and has exceptional corrosion resistance, effectively extending the life of the product.
- [USER-FRIENDLY HANDHELD DESIGN]: The handheld part of the case is lined with silicone substrate and provides excellent grip and lightweight design for easy one-handed operation.
- [WARRANTY]: We provide 24 months warranty and 7x24 hours friendly customer service to ensure your shopping experience. If you have any problems, please feel free to contact us, we will offer you a solution as soon as possible.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | QPKING |
| Brand | QPKING |
| Model | AS503 Motoröl-Qualitätsprüfgerät |
| Package Dimensions | 25.5 x 14.2 x 5.89 cm; 372 g |
| Manufacturer reference | AS503 Motoröl-Qualitätsprüfgerät |
| Manufacturer part number | AS503 Motoröl-Qualitätsprüfgerät |
| Item Weight | 372 g |

## Images

![Engine Oil Quality Tester AS503 Engine Oil Tester for Petrol and Diesel Vehicles with 2.8-Inch Screen, High-Precision Detection Probe, Transmission Oil Temperature Display - Image 1](https://m.media-amazon.com/images/I/61J2FHUeZsL.jpg)

## Questions & Answers

**Q: Is this easy to use for someone who's not a mechanic?**
A: Absolutely! It's designed for everyone.Just wipe the probe, select your engine type(gasoline or diesel), dip it in the oil, and press the button.You'll get a clear "OK" or "Replace" result on the large screen in seconds—no technical knowledge needed.

**Q: How accurate is it compared to just looking at the oil color?**
A: More accurate than the human eye, our optical sensor analyzes microscopic oil contaminants to give definitive percentage and temperature readings—eliminating maintenance guesswork.

**Q: Does it work on both old and new cars, and for diesel trucks?**
A: Yes! It is universally compatible with the majority of gasoline and diesel engine oils on the market. Separate testing modes ensure accurate assessment for each engine type, whether it's your daily car, SUV, or diesel pickup truck.

**Q: Why should I buy this instead of just changing my oil regularly?**
A: It helps you change oil smartly,not just regularly.It prevents you from changing oil too early (saving money)or too late (preventing engine damage).It's the fastest way to know if your oil is still good,optimizing both engine health and your wallet.

**Q: How do I know this is a reliable brand?**
A: The AS503 is built with professional-grade components like a PTFE-coated probe and a robust optical sensor. It comes with a clear manual and is trusted by DIYers and professionals for its simple, dependable readings. Your satisfaction is guaranteed.

## Frequently Bought Together

- Engine Oil Quality Tester AS503 Engine Oil Tester for Gasoline Diesel Vehicles With 2.8"Screen High-Precision Detection Probe,Transmittance&Oil Temp.Display,Compatible With Various Lubricant Standards
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**Shop now:** [https://www.desertcart.kr/products/670866587-engine-oil-quality-tester-as503-engine-oil-tester-for-petrol](https://www.desertcart.kr/products/670866587-engine-oil-quality-tester-as503-engine-oil-tester-for-petrol)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-03-08*