--- product_id: 26257093 title: "Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Quart, Pack of 6" brand: "castrol" price: "£70.09" currency: GBP in_stock: true reviews_count: 8 category: "Castrol" url: https://www.desertcart.co.uk/products/26257093-castrol-transmax-dex-merc-automatic-transmission-fluid-1-quart-pack store_origin: GB region: Great Britain --- # Compatible with Ford '83-'96 & GM pre-2005 Meets DEXRON-III H & MERCON specs Pack of 6 quarts for long-term use Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Quart, Pack of 6 **Brand:** castrol **Price:** £70.09 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift into the future with Castrol’s ultimate transmission fluid! ## Quick Answers - **What is this?** Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Quart, Pack of 6 by castrol - **How much does it cost?** £70.09 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/26257093-castrol-transmax-dex-merc-automatic-transmission-fluid-1-quart-pack) ## 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 - • **Multi-Use Fluid Efficiency:** Also suitable for power steering systems requiring MERCON, maximizing your maintenance convenience. - • **Bulk Pack for Smart Savings:** Six 1-quart bottles provide long-lasting supply, perfect for proactive vehicle care and cost efficiency. - • **Industry-Leading Compatibility:** Meets and exceeds DEXRON-III H, DEXRON, IIE, IIM, and MERCON standards for versatile vehicle coverage. - • **Precision Engineered for Smooth Shifts:** Enhanced friction durability ensures seamless transmission performance under all driving conditions. - • **Trusted by Professionals & Enthusiasts:** Highly rated with 4.7 stars from 157 reviews, a proven choice for reliable transmission health. ## Overview Castrol Transmax DEX/MERC is a premium automatic transmission fluid designed for Ford models from 1983-1996 and General Motors vehicles up to 2005. It meets rigorous DEXRON-III H and MERCON specifications, ensuring enhanced friction durability and smooth transmission performance. This pack of six 1-quart bottles offers excellent value and versatility, also suitable for power steering systems requiring MERCON fluid. ## Description Castrol Transmax DEX/MERC automatic transmission fluid is for use in all Ford models 1983 to 1996 and for General Motors 2005 and earlier vehicles. Review: atf - another good castrol product Review: Fluid made for GM TH350 transmission at a good price. - Excellent product and was a good price. ## Features - Enhanced friction durability for smooth transmission performance - Meets DEXRON-III H requirements and satisfies requirements of DEXRON, DEXRON-III, IIE and II - Meets MERCON requirements - May also be used in power steering applications where MERCON is required ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B008MISAXQ | | Best Sellers Rank | #83,059 in Automotive ( See Top 100 in Automotive ) #175 in Transmission Fluids | | Brand | Castrol | | Brand Name | Castrol | | Container Type | Bottle | | Customer Reviews | 4.7 out of 5 stars 157 Reviews | | Global Trade Identification Number | 00079191068205 | | Included Components | Transmission Fluid | | Item Form | Oil | | Item Weight | 0.01 Ounces | | Liquid Volume | 192 Fluid Ounces | | Manufacturer | Castrol | | Package Information | Bottle | | UPC | 079191068205 | | Unit Count | 192 Fluid Ounces | ## Product Details - **Brand:** Castrol - **Item Form:** Oil - **Item Weight:** 0.01 Ounces - **Liquid Volume:** 192 Fluid Ounces - **Package Information:** Bottle ## Images ![Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Quart, Pack of 6 - Image 1](https://m.media-amazon.com/images/I/61+qZ4Lhh6L.jpg) ## Questions & Answers **Q: Is this product a substitute for shell donax ta which is the oem product for power steering in a 2001 ferrari 550m?** A: The Castrol Consumer Relations office would be happy to assist you. Our contact information can be found at: https://www.castrol.com/en_us/united-states/home/castrol-story/contact-us.html **Q: will this work in a 2011 BMW 328i standard auto transmission?** A: Hi! For your BMW, we'd recommend using Transmax Full Synthetic Multi-Vehicle ATF or Transmax Dexron-VI Mercon LV instead. **Q: Hi! will this work in a 2014 infiniti qx70 standard automatic transmission?** A: According to Castrol’s Lubrication Recommendation Guide, Nissan Matic-S fluid is required for use in a 2014 Infiniti QX70 vehicle. Castrol Transmax DEX/MERC does NOT meet the specifications of Nissan Matic-S fluid therefore Castrol Transmax DEX/MERC is NOT recommended for use and should NOT be used in said vehicle. Castrol always recommends following the guidelines of the original engine manufacturer for the recommended fluid for use in your specific application. This information can be found in the vehicle's owner's manual or by contacting the manufacturer directly. Before using any lubricant, ensure that the lubricant product specifications meet or exceed the lubricant specifications required by the Original Equipment Manufacturer (OEM) for that specific use. **Q: will this work in a 2007 ford mustang V6, Automatic Transmission?** A: Thank you for contacting Castrol North America. Castrol always recommends following the guidelines of the original engine manufacturer for the recommended fluid for use in your specific application. This information can be found in the vehicles owner’s manual or by contacting the manufacturer directly. Additionally, for information on all Castrol products (motor oils, ATF, brake fluid, greases, gear oils), please refer to the Castrol US web page (http://www.castrol.com/en_us/united-states.html). According to Castrol’s Recommendations Guide, recommended for a 2007 Ford Mustang 4.0L 6 cyl is the Castrol Transmax Mercon V ATF, Castrol Transmax Import Multi-Vehicle ATF, Castrol Transmax High Mileage ATF, & Castrol Transmax Full Synthetic Multi-Vehicle ATF. Castrol Transmax Mercon V ATF, Castrol Transmax Import Multi-Vehicle ATF, Castrol Transmax High Mileage ATF, & Castrol Transmax Full Synthetic Multi-Vehicle ATF are suitable for use where Ford MERCON V type fluid is specified and may be used in your application. Castrol cannot guarantee compatibility with competitive fluids as we do not know their proprietary formula, therefore we recommend a complete drain of the transmission and re-fill with Castrol Transmax Mercon V ATF, Castrol Transmax Import Multi-Vehicle ATF, Castrol Transmax High Mileage ATF, or Castrol Transmax Full Synthetic Multi-Vehicle ATF. This should include draining the torque converter which holds about one-half of the ATF volume -- dropping the pan will not cause the torque converter to drain. You may find directions for draining the torque converter online, or may wish to have this service performed for you by a service facility. Castrol Consumer Relations ## Customer Reviews ### ⭐⭐⭐⭐⭐ atf *by L***E on January 6, 2026* another good castrol product ### ⭐⭐⭐⭐⭐ Fluid made for GM TH350 transmission at a good price. *by P***L on July 7, 2025* Excellent product and was a good price. ### ⭐⭐⭐⭐⭐ Prices are good *by D***N on January 3, 2026* Very pleased with prices ## Frequently Bought Together - Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Quart, Pack of 6 - Castrol Transmax DEX/MERC ATF, 1 Gallon, Automatic, Black - Lucas Oil 10009 Transmission Fix - 24 Ounce, White --- ## 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.co.uk/products/26257093-castrol-transmax-dex-merc-automatic-transmission-fluid-1-quart-pack](https://www.desertcart.co.uk/products/26257093-castrol-transmax-dex-merc-automatic-transmission-fluid-1-quart-pack) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-22*