Is this easy to use for someone who's not a mechanic?

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.

How accurate is it compared to just looking at the oil color?

More accurate than the human eye, our optical sensor analyzes microscopic oil contaminants to give definitive percentage and temperature readings—eliminating maintenance guesswork.

Does it work on both old and new cars, and for diesel trucks?

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.

Why should I buy this instead of just changing my oil regularly?

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.

How do I know this is a reliable brand?

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.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Engine Oil Tester for Petrol & Diesel - 2.8" LCD with Backlight, High Precision Optical Probe, Oil Temperature Display in °C/F, Flexible 800mm PTFE Hose - AS503

Product ID: 670866587

🎯High-precision optical probe

📏2.8-inch HD screen

🌡️Real-time oil temperature display

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C$7645

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In stock

Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Diagnose Like a Pro, Drive with Confidence!

SEE MORE KNOW MORE - Large 2.8-inch screen ensures clear, easy-to-read results, minimizing guesswork during diagnostics.
CONFIDENCE BACKED BY SUPPORT - 24-month warranty plus 24/7 customer service means you’re never alone in maintaining peak engine performance.
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, giving you instant insight into engine health.
FLEXIBLE TESTING MAXIMUM COMFORT - 800mm PTFE hose probe offers exceptional flexibility and corrosion resistance for effortless, reliable sampling.

The AS503 Engine Oil Quality Tester is a handheld, high-precision device designed for petrol and diesel vehicles. Featuring a 2.8-inch display and a flexible, corrosion-resistant PTFE probe, it provides accurate oil quality and temperature readings. Compatible with multiple lubricating oil standards, it ensures precise diagnostics with user-friendly operation and reliable customer support.

Specifications

ASIN	B0CG99ZLX7
Best Sellers Rank	122,672 in Automotive ( See Top 100 in Automotive ) 23 in Oil Pressure Testers
Brand	QPKING
Customer Reviews	4.3 4.3 out of 5 stars (109)
Date First Available	17 May 2024
Item Weight	372 g
Item model number	AS503 engine oil tester
Manufacturer	QPKING
Manufacturer part number	AS503 Motoröl-Qualitätsprüfgerät
Model	AS503 Motoröl-Qualitätsprüfgerät
Package Dimensions	25.5 x 14.2 x 5.89 cm; 372 g

Reviews

Y**A

شكرا ً لكم

13.07.2025

M**K

Ist gut und einfach anzuwenden und funktioniert recht gut. Man kann damit seine Motoröl Qualität überprüfen

28.10.2025

M**D

Works good, tried few different cars with old and new oil, shows about right. Definetely worth the the money

24.02.2026

C**N

Molto utile

7.04.2026

C**S

Muito preciso e de excelente qualidade

5.01.2025

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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C$7645

Duties & taxes included

In stock

Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Nicaragua.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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