--- product_id: 7756979 title: "Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon" brand: "castrol" price: "€ 129.31" currency: EUR in_stock: true category: "Castrol" url: https://www.desertcart.at/products/7756979-transmax-dex-merc-automatic-transmission-fluid-1-gallon store_origin: AT region: Austria --- # High-temp resistance up to 175°C Universal multi-vehicle compatibility Superior copper corrosion protection Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon **Brand:** castrol **Price:** € 129.31 **Availability:** ✅ In Stock ## Summary > ⚙️ Drive Smooth, Stay Ahead – The Fluid of Future-Ready Transmissions ## Quick Answers - **What is this?** Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon by castrol - **How much does it cost?** € 129.31 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/7756979-transmax-dex-merc-automatic-transmission-fluid-1-gallon) ## Best For - castrol enthusiasts ## Why This Product - Trusted castrol brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Heat? No Sweat.:** Superior high-temperature oxidation resistance keeps your transmission fluid stable under pressure. - • **Guard Against Wear:** Unmatched protection against copper corrosion extends transmission life and reliability. - • **One Fluid, Many Rides:** Broad vehicle compatibility across North & South America, Europe, and Asia streamlines your maintenance routine. - • **Castrol Smooth Drive Tech:** Advanced synthetic formula delivers consistent performance in both stepped and CVT transmissions. - • **Smooth Shifting, Every Drive:** Enhanced friction durability ensures seamless transmission performance for a premium driving experience. ## Overview Castrol Transmax DEX/MERC is a premium full-synthetic automatic transmission fluid engineered with Smooth Drive Technology. It offers exceptional friction durability, high-temperature oxidation resistance up to 175°C, and superior copper corrosion protection. Designed for universal use in both stepped and continuously variable transmissions across global vehicle models, it optimizes performance and extends transmission life. ## Description Castrol Transmax ATF/CVT Universal is a technologically advanced full-synthetic formulation designed to deliver excellent performance in most of the traditional stepped automatic transmissions and Continuously Variable Transmissions currently in use. It is blended with premium base oils and an additive package which utilizes Castrol Smooth Drive Technology. This is the first Castrol multivehicle ATF suitable for use in both step-shifting and continuously variable automatic transmissions. Transmax ATF/CVT Universal is suitable for use in vehicles manufactured in North & South America, Europe, and Asia. ## Features - Enhanced friction durability for smooth transmission performance - Superior high temperature protection to effectively resist oxidation - Unsurpassed protection against copper corrosion - Broad scope of vehicle applications improves workshop efficiency and inventory management ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00DILUBL6 | | Best Sellers Rank | #12,878 in Automotive ( See Top 100 in Automotive ) #45 in Transmission Fluids | | Brand Name | Castrol | | Container Type | Bottle | | Customer Reviews | 4.8 4.8 out of 5 stars (2,246) | | Global Trade Identification Number | 00079191335208 | | Included Components | 1 Gallon Jug of Automatic Transmission Fluid | | Item Form | Liquid | | Item Type Name | Automatic Transmission Fluid | | Liquid Volume | 128 fluid ounces | | Manufacturer | Castrol | | Material | Calcium Sulfonate, Molybdenum Disulfide | | Model Number | 03520 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 03520 | | Recommended Uses For Product | Automotive | | SAE J300 Viscosity Grade | 5W-30 | | Specific Uses For Product | Automatic Transmission Maintenance, Vehicle Compatibility, Performance Improvement | | UPC | 079191335208 | | Unit Count | 128 Fluid Ounces | | Upper Temperature Rating | 175 °C | | Viscosity | 5w-30 | | Warranty Description | 3 months | ## Product Details - **Brand:** Castrol - **Liquid Volume:** 128 fluid ounces - **Material:** Calcium Sulfonate, Molybdenum Disulfide - **Package Information:** Bottle - **Recommended Uses For Product:** Automotive ## Images ![Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/61aEVtXcf5L.jpg) ## Questions & Answers **Q: Can I use it in a 2000** A: Honda s2000? 2000 model year Ferrari? 2000 individual mini cooper's? Perhaps the answer isn't in the answer. Perhaps the answer is in the question. As in, why would you touch your vehicle if you can't ask an appropriate question? **Q: will this work for a 98 jeep cherokee auto 4wd** A: Here is a link to the list of approved vehicles from Castrol!!! https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/1BF017717048528380257EDC004D3B0A/$File/BPXE-9FT8RL.pdf **Q: does this fluid replaces ATF-Z1?** A: ATF-Z1 is Dex3 with a friction modifier. This will cover that spec. As the trans ages & wears you may be better served by using a higher viscosity fluid such as AMSOIL ATF. If you are doing a drain & refill, the ffirst one is about 44% new fluid replacement. The 3rd. one will take you to 85%. Think diloution rate vs. volume. **Q: Can this work w/ toyota camry 1999 uses dexron iii? also, can i mix other brand dexron iii (not for hi mileage) w/ this castrol atf for high mileage?** A: Yes and yes. However, in my experience, Dexron VI (even in an old worn transmission) will dramatically improve shift quality even in transmissions rated for Dexron III or Toyota Type IV (which is rebranded Dexron IV). ## Frequently Bought Together - Castrol Transmax DEX/MERC ATF, 1 Gallon, Automatic, Black - PEAK 50/50 Prediluted Antifreeze and Coolant for All Engine Cooling Systems - Prestone AS401 DOT 3 Synthetic Brake Fluid - 32 oz. --- ## 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.at/products/7756979-transmax-dex-merc-automatic-transmission-fluid-1-gallon](https://www.desertcart.at/products/7756979-transmax-dex-merc-automatic-transmission-fluid-1-gallon) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-08-16*