--- product_id: 554277771 title: "Engine Oil Quality Tester AS503 Engine Oil Tester for Gasoline Diesel Vehicles with 2.8-inch Backlit Screen" brand: "qpking" price: "FREE" currency: USD in_stock: false category: "Qpking" url: https://www.desertcart.us/products/554277771-engine-oil-quality-tester-as503-engine-oil-tester-for-gasoline store_origin: US region: United States of America --- # 800mm flexible PTFE hose 2.8-inch backlit HD screen High-precision optical probe Engine Oil Quality Tester AS503 Engine Oil Tester for Gasoline Diesel Vehicles with 2.8-inch Backlit Screen **Brand:** qpking **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > ⚡ Diagnose Like a Pro, Drive with Confidence! ## Quick Answers - **What is this?** Engine Oil Quality Tester AS503 Engine Oil Tester for Gasoline Diesel Vehicles with 2.8-inch Backlit Screen by qpking - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/554277771-engine-oil-quality-tester-as503-engine-oil-tester-for-gasoline) ## 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 - • **Test Anywhere, Anytime:** 800mm PTFE hose probe offers unmatched flexibility and corrosion resistance for effortless sampling in tight engine spaces. - • **Stay Informed Instantly:** Large 2.8-inch backlit LCD screen ensures crystal-clear visibility of results, day or night, boosting your diagnostic confidence. - • **Engine Health at a Glance:** Integrated oil temperature sensor provides real-time engine status, empowering proactive maintenance decisions. - • **Precision Meets Performance:** High-precision optoelectronic sensor delivers ultra-accurate oil quality readings for both gasoline and diesel engines. - • **Built for Professionals, Designed for Comfort:** Ergonomic handheld design with silicone grip enables easy, single-handed operation during busy workdays. ## Overview The QPKING AS503 Engine Oil Quality Tester is a cutting-edge diagnostic tool compatible with most gasoline and diesel lubricants. Featuring a high-precision optical probe, an 800mm flexible PTFE hose for convenient sampling, and a bright 2.8-inch backlit LCD screen, it delivers accurate oil health assessments and real-time temperature readings. Designed for professional ease with a silicone grip and backed by a 3-year warranty, it’s the ultimate must-have for proactive vehicle maintenance. ## Description Buy QPKING Engine Oil Quality Tester AS503 Engine Oil Tester for Gasoline Diesel Vehicles with 2.8-inch Backlit Screen online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase. ## Features - 👍[COMPATIBLE WITH VARIOUS LUBRICANT OIL STANDARDS]: AS503 Engine Oil Quality Tester Suitable for the majority of gasoline and diesel engine lubricant oils availablein the market. Separate sampling and measurement for gasoline anddiesel engines allow for more precise assessment of lubricant oil health. - 👍[OIL TEMPERATURE DISPLAY]: Integrated temperature sensor for convenient assessmentof the engine's operating status. - 👍[HIGH-PRECISION OPTICAL PROBE]: Integrated with a high-precision optoelectronic sensorensuring more accurate measurement results. - 👍[FLEXIBLE HOSE PROBEFOR CONVENIENT TESTING]: The 800mm long probe designoffers a more flexible & convenientway ofconducting tests.The hose is made of PTFE materialhighly resistant to oil & oxidationand boasts exceptional corrosionresistance, effectively extendingthe product's lifespan. - 👍[USER-FRIENDLYHANDHELD DESIGN]: AS503 Engine Oil Quality Tester body's handheld portion is lined with silicone substrate.providing excellent grip & lightweight designfor easy single-handed operation. - 👍[LARGE LCD WITH HIGH DEFINITION]:AS503 Engine Oil Tester Equipped with a backlit 2.8- inch LCD screen, providing users with a clear display for efficient operation even in varying lighting conditions, be it bright daylight or dim nighttime. - 👍【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 | | Best Sellers Rank | #50,053 in Automotive ( See Top 100 in Automotive ) #8 in Automotive Oil Pressure Testers | | Brand | QPKING | | Customer Reviews | 4.2 4.2 out of 5 stars (130) | | Date First Available | 22 August 2023 | | Item Weight | 372 g | | Item model number | AS503 engine oil tester | | Manufacturer | QPKING | | Manufacturer Part Number | AS503 Motoröl-Qualitätsprüfgerät | | Model | oil quality tester | | Package Dimensions | 25.5 x 14.2 x 5.89 cm; 372 g | ## Images ![Engine Oil Quality Tester AS503 Engine Oil Tester for Gasoline Diesel Vehicles with 2.8-inch Backlit Screen - 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 - TYRAREX Automotive Transmission Fluid Tester Oil Analyzer Detector with Temperature Sensor, Gasoline & Diesel Gearbox Oil Diagnostic Tool with 31.5in Hose 2.8in Backlight Display (T20) - Brake Fluid Tester, High Precision Car Brake Fluid Detector, Hydraulic Fluid/Liquid/Oil Moisture Analyzer with LCD Screen Audible Alarm DOT3 DOT4 DOT5.1 Tester,Automotive Replacement Level Sensors --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/554277771-engine-oil-quality-tester-as503-engine-oil-tester-for-gasoline](https://www.desertcart.us/products/554277771-engine-oil-quality-tester-as503-engine-oil-tester-for-gasoline) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-06*