--- product_id: 296348336 title: "Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye" brand: "a/c pro" price: "€ 22.08" currency: EUR in_stock: true reviews_count: 5 category: "A/C Pro" url: https://www.desertcart.pt/products/296348336-interdynamics-374cs-certified-a-c-pro-oil-and-fuel-systems store_origin: PT region: Portugal --- # UV leak detection technology One-time application for quick results Compatible with all petroleum-based lubricants Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye **Brand:** a/c pro **Price:** € 22.08 **Availability:** ✅ In Stock ## Summary > 🔦 Illuminate hidden leaks before they become costly headaches! ## Quick Answers - **What is this?** Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye by a/c pro - **How much does it cost?** € 22.08 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/296348336-interdynamics-374cs-certified-a-c-pro-oil-and-fuel-systems) ## Best For - a/c pro enthusiasts ## Why This Product - Trusted a/c pro brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by pros:** Certified A/C Pro quality ensures reliable, accurate leak detection every time. - • **Save time and money:** One application quickly identifies leak sources, avoiding costly guesswork and repairs. - • **Drive with confidence:** Detect leaks early to maintain peak vehicle performance and avoid unexpected breakdowns. - • **Universal compatibility:** Works seamlessly with engine oil, transmissions, power steering, and gas/diesel fuel systems. - • **Pinpoint leaks with UV precision:** Professional-grade dye reveals hidden oil and fuel leaks instantly under black light. ## Overview Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye is a professional-grade, one-application UV dye designed to detect leaks in engine oil, transmissions, power steering, and fuel systems. Compatible with all petroleum-based lubricants, it helps pinpoint leak sources quickly and accurately under black light, saving time and repair costs. ## Description Certified A/C Pro Oil And Fuel Systems UV Dye is for use in engine oil, transmissions, power steering systems, and gas or diesel fuel systems to help determine where there might be a leak. Includes one application of oil and fuel system UV leak detection dye. Certified A/C Pro Oil and Fuel Systems UV Dye is a professional grade leak detection dye that is compatible with all weights of petroleum based lubricant. Review: Useless - Does not identify leak Review: An absolute time saver. - If you are chasing a "phantom" leak that seems to be dripping from the sump but you suspect is originating elsewhere, this UV dye is an absolute lifesaver. I used it to track down a stubborn leak on my Alfa. From underneath the car, everything pointed toward a sump gasket failure, but the dye revealed a completely different story. Once circulated, the fluorescent trail showed the oil was actually weeping from a seal much higher up the block and simply trailing down the casting. ## Features - One application of oil and fuel system UV leak detection dye - For use in engine oil, transmissions, power steering systems and gas/diesel fuel systems - Compatible with all weights of petroleum-based lubricant - Helps locate leaks - Professional grade ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002M4G24U | | Best Sellers Rank | #133,371 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #230 in Fuel System Tools | | Brand | A/C Pro | | Brand Name | A/C Pro | | Customer Reviews | 4.5 out of 5 stars 2,433 Reviews | | Global Trade Identification Number | 00047876013741 | | Included Components | QUEST Auto A/C Recharge | | Item Type Name | Auto A/C Recharge | | Item Weight | 0.1 Pounds | | Manufacturer | QUEST | | Material | Fluorescent Dye in Liquid/Gel Base | | Material Type | Fluorescent Dye in Liquid/Gel Base | | Measuring Range | Broad (Universal) | | Model Number | 374CS | | Mounting Type | Flange Mount | | Output Type | Digital | | Part Number | 374CS | | Smart Home Compatibility | Not Smart Home Compatible | | Specific Uses For Product | Automotive leak detection | | Style | Compatible | | Style Name | Compatible | | UPC | 047876013741 | | Unit Count | 1.0 Ounce | | Upper Temperature Rating | 250 Degrees Fahrenheit | ## Product Details - **Brand:** A/C Pro - **Item Weight:** 45 g - **Material:** Plastic - **Measuring Range:** Broad (Universal) - **Style:** Compatible ## Images ![Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye - Image 1](https://m.media-amazon.com/images/I/61BIGw3L+tL.jpg) ![Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye - Image 2](https://m.media-amazon.com/images/I/61PPqPJguKL.jpg) ![Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye - Image 3](https://m.media-amazon.com/images/I/61+VNRJnlBL.jpg) ![Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye - Image 4](https://m.media-amazon.com/images/I/81b3-62wHiL.jpg) ![Interdynamics 374CS Certified A/C Pro Oil and Fuel Systems UV Dye - Image 5](https://m.media-amazon.com/images/I/71lnp1V+zxL.jpg) ## Questions & Answers **Q: Will i need to change the oil after adding the product or can i run it 3k miles?** A: You probably don't need to but....I personally would add the UV dye right before you need a oil change. That way you can drive your vehicle for however long. Probably a good 2 days, drain the oil/ fix the problem, then refill with fresh oil. **Q: do you really need the yellow goggle to see the dye?** A: I had no problems seeing the dye without the glasses. **Q: can this dye be mixed with mineral oil and used in smoke test machines** A: The answer is yes. I used it in my smoke machine to test an engine in my 1996 BMW Z3 1.9. It worked fine. **Q: So i just pour all of this bottle into engine oil and look with blacklight?** A: Thats exactly what I did to locate a hard to find oil leak. BTW: to get a clean read, you will need to clean the engine beforehand, add the dye and then drive 20 miles or so to locate the leak. ## Customer Reviews ### ⭐ Useless *by A***Q on 24 August 2024* Does not identify leak ### ⭐⭐⭐⭐⭐ An absolute time saver. *by D***M on 24 April 2026* If you are chasing a "phantom" leak that seems to be dripping from the sump but you suspect is originating elsewhere, this UV dye is an absolute lifesaver. I used it to track down a stubborn leak on my Alfa. From underneath the car, everything pointed toward a sump gasket failure, but the dye revealed a completely different story. Once circulated, the fluorescent trail showed the oil was actually weeping from a seal much higher up the block and simply trailing down the casting. ### ⭐⭐⭐⭐⭐ Works Perfect to Locate a Leak. *by W***R on 13 April 2026* Worked as expected. Wasn’t like NEON but worked great. Found the leak right away. ## Frequently Bought Together - InterDynamics Certified Auto Pro Oil and Fuel System UV Dye Leak Detection for Cars & Trucks & More, 1 Oz, 374CS, Universal - REALHUNLEE Air Conditioner UV Dye Leak Detector, Pro Auto Oil AC UV Dye Leak Test Detection Tool Kit 68 LED A/C UV Flashlight Detector with Protective Glasses --- ## 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.pt/products/296348336-interdynamics-374cs-certified-a-c-pro-oil-and-fuel-systems](https://www.desertcart.pt/products/296348336-interdynamics-374cs-certified-a-c-pro-oil-and-fuel-systems) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-17*