---
product_id: 585925504
title: "AS503 Engine Oil Quality Tester – Handheld Lubricant Tester with High-Precision Optical Sensor, Backlit LCD Display, Oil Temp & Transmittance Detection for Gasoline & Diesel Engines Oil Quality Tester"
brand: "qpking"
price: "380 Lei"
currency: RON
in_stock: true
reviews_count: 13
category: "Qpking"
url: https://www.desertcart.ro/products/585925504-as503-engine-oil-quality-tester-handheld-lubricant-tester-with-high
store_origin: RO
region: Romania
---

# Real-time oil temp & transmittance display High-precision optical sensor Ergonomic handheld design with 800mm flexible probe AS503 Engine Oil Quality Tester – Handheld Lubricant Tester with High-Precision Optical Sensor, Backlit LCD Display, Oil Temp & Transmittance Detection for Gasoline & Diesel Engines Oil Quality Tester

**Brand:** qpking
**Price:** 380 Lei
**Availability:** ✅ In Stock

## Summary

> 🛢️ Don’t guess your oil’s health—know it with precision and style!

## Quick Answers

- **What is this?** AS503 Engine Oil Quality Tester – Handheld Lubricant Tester with High-Precision Optical Sensor, Backlit LCD Display, Oil Temp & Transmittance Detection for Gasoline & Diesel Engines Oil Quality Tester by qpking
- **How much does it cost?** 380 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/585925504-as503-engine-oil-quality-tester-handheld-lubricant-tester-with-high)

## 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

- • **Plug & Play in 3 Steps:** Wipe, select engine type, immerse, and test—get instant, reliable results in seconds.
- • **See the Status at a Glance:** 2.8-inch backlit LCD shows real-time oil temperature and health status (OK/Replace) in °C/°F.
- • **Pinpoint Oil Health Instantly:** Advanced optoelectronic sensor delivers precise contamination and transmittance readings for gasoline & diesel oils.
- • **Tailored for Gasoline & Diesel:** Dual testing modes ensure industry-standard accuracy for all engine oil types.
- • **Effortless Single-Handed Testing:** Ergonomic silicone grip and long flexible probe reach even the toughest oil fill ports with ease.

## Overview

The AS503 Engine Oil Quality Tester by QPKING is a handheld device featuring a high-precision optical sensor and a backlit 2.8-inch LCD for real-time oil temperature and transmittance readings. Designed for both gasoline and diesel engines, it offers ergonomic single-handed operation with an 800mm flexible probe, delivering instant, accurate oil health assessments to help professionals maintain peak engine performance.

## Description

Buy AS503 Engine Oil Quality Tester – Handheld Lubricant Tester with High-Precision Optical Sensor, Backlit LCD Display, Oil Temp & Transmittance Detection for Gasoline & Diesel Engines Oil Quality Tester: Automotive - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Excelente herramienta
Review: De buena calidad y duradero

## Features

- 👍【High-Precision Optical Detection Probe】 AS503 engine oil tester features an advanced optoelectronic sensor to accurately measure oil transmittance and contamination levels for both gasoline and diesel engines.
- 👍 【Real-Time Oil Temperature & Transmittance Display】 AS503 oil quality tester integrated temperature sensor and 2.8-inch backlit LCD screen show oil health status (OK / Replace) and temperature in °C/°F.
- 👍 【User-Friendly Handheld Design with Flexible 800mm Probe】Ergonomic silicone grip and long PTFE hose allow easy single-handed operation and access to hard-to-reach oil fill ports.
- 👍【Compatible with Most Engine Oils】 AS503 lubricant tester supports separate testing modes for gasoline and diesel lubricants, ensuring precise assessment based on industry standards.
- 👍【Easy Operation in 3 Steps】 Simply wipe the probe, select engine type, immerse in oil, and press test to get instant results within seconds.
- 👍【Three Years Warranty And Lifelong Maintenance】For the damage caused by non-human factors, we promises to resend the parts for free within 3 years. For any demand, we warmly welcome you to contact us, and we will reply you as soon as possible within 24 hours.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CG99ZLX7 |
| Brand | QPKING |
| Customer Reviews | 4.4 4.4 out of 5 stars (97) |
| Date First Available | August 22, 2023 |
| Item Weight | 13.1 ounces |
| Item model number | AS503 engine oil tester |
| Manufacturer | QPKING |
| Manufacturer Part Number | AS503 Motoröl-Qualitätsprüfgerät |
| Model | oil quality tester |
| Package Dimensions | 10.04 x 5.59 x 2.32 inches |

## Images

![AS503 Engine Oil Quality Tester – Handheld Lubricant Tester with High-Precision Optical Sensor, Backlit LCD Display, Oil Temp & Transmittance Detection for Gasoline & Diesel Engines Oil Quality Tester - 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***O on February 5, 2026*

Excelente herramienta

### ⭐⭐⭐⭐⭐ Review
*by V***7 on October 23, 2025*

De buena calidad y duradero

### ⭐⭐⭐⭐⭐ Review
*by O***R on May 20, 2025*

Me agrada la idea de tener una forma de conocer el estado real del aceite.

## 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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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-23*