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.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

AS503 Engine Oil Tester - Optical Transmittance Analyzer for Gasoline & Diesel, 31.5-inch Flexible Probe, 2.8-inch Backlit LCD, Oil Temperature Gauge in °C/°F

AS503 Engine Oil Tester - Optical Transmittance Analyzer for Gasoline & Diesel, 31.5-inch Flexible Probe, 2.8-inch Backlit LCD, Oil Temperature Gauge in °C/°F

Product ID: 585925504

🌀31.5-inch flexible PTFE probe

🔬0-100% optical transmittance in 2s

🛢️Dual gasoline & diesel testing modes

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

MOP$505

Duties & taxes included

In stock

Sold byAmazon MacauDelivered 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 Macau.

Secure transaction

Description

🛠️ Know Your Oil, Own the Road: Smart Testing for Savvy Drivers

REACH EVERY DROP - Extra-long, oil-resistant flexible probe navigates tight dipstick tubes effortlessly for thorough testing in any engine layout.
CLEAR RESULTS ANYTIME - Large backlit LCD and ergonomic grip provide easy, one-handed operation with straightforward OK/Replace indicators—perfect for any lighting condition.
PRECISION AT YOUR FINGERTIPS - Advanced optical sensor delivers instant, accurate oil health readings in just 2 seconds—no guesswork, only confidence.
SMART TEMPERATURE VERIFICATION - Built-in temperature gauge confirms optimal oil warmth before testing, guaranteeing the most precise transmittance measurement.
UNIVERSAL ENGINE COMPATIBILITY - Tailored algorithms for gasoline and diesel oils ensure reliable results whether you drive a sedan, SUV, or heavy-duty truck.

The AS503 Engine Oil Tester is a professional-grade optical transmittance analyzer designed for both gasoline and diesel engines. Featuring a 31.5-inch flexible PTFE probe, a high-precision sensor delivering results in 2 seconds, and a built-in temperature gauge, it empowers users to accurately assess oil quality and optimize maintenance timing. Its large backlit LCD and ergonomic design make it accessible for DIYers and professionals alike, backed by a 3-year warranty and lifetime maintenance support.

Specifications

ASIN	B0CG99ZLX7
Brand	QPKING
Customer Reviews	4.3 4.3 out of 5 stars (122)
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

Common Questions

Are the products genuine and authentic?+

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.

How long does delivery take and is it reliable?+

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.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.