--- product_id: 276938146 title: "30504 D4 Synthetic Automatic Transmission Fluid (ATF) - 1 Quart" brand: "red line" price: "HK$340" currency: HKD in_stock: true reviews_count: 5 category: "Red Line" url: https://www.desertcart.hk/products/276938146-30504-d4-synthetic-automatic-transmission-fluid-atf-1-quart store_origin: HK region: Hong Kong --- # High thermal stability GL-4 gear protection Low-temp shiftability 30504 D4 Synthetic Automatic Transmission Fluid (ATF) - 1 Quart **Brand:** red line **Price:** HK$340 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift smarter, not harder — the pro’s choice for flawless transmission performance! ## Quick Answers - **What is this?** 30504 D4 Synthetic Automatic Transmission Fluid (ATF) - 1 Quart by red line - **How much does it cost?** HK$340 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/276938146-30504-d4-synthetic-automatic-transmission-fluid-atf-1-quart) ## Best For - red line enthusiasts ## Why This Product - Trusted red line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Cold Starts:** Experience buttery smooth shifts even in freezing temps with ultra-low viscosity. - • **Gear & Synchro Guardian:** GL-4 level protection ensures your manual and automatic transmissions stay flawless under pressure. - • **Universal Compatibility:** Works seamlessly with Dexron III, Mercon V, and popular OEM specs like Toyota T-III & Honda ATF-Z1. - • **Extended Drain Intervals:** Superior synthetic formula resists varnish and wear, keeping your transmission fresh longer. - • **Trusted Legacy Performance:** Since 1979, Red Line delivers uncompromising quality favored by enthusiasts and pros alike. ## Overview Red Line 30504 D4 Synthetic ATF is a premium 5W synthetic transmission fluid engineered for superior low-temperature shiftability, high thermal stability, and GL-4 gear protection. Compatible with a wide range of automatic and manual transmissions including Toyota, Honda, BMW, and Audi/VW models, it ensures smooth, consistent shifting and extended transmission life. Trusted since 1979, this fluid is the go-to for professionals seeking reliable, high-performance transmission care. ## Description Red Line Synthetic Automatic Transmission Fluids are designed to provide excellent low-temperature shiftability and improved thermal stability over petroleum ATFs. These fluids provide a much lower viscosity at cold temperatures for quicker shifting and their balanced frictional characteristics provide smooth and consistent shifts over extended drain intervals. The superior stability compared to petroleum ATFs also allow high-temperature operation without varnishing valves and clutches, which leads to transmission failure. Review: Excellent produit ! - Très bon produit, j'utilise ce produit exclusivement pour ma Corvette C6 depuis longtemps ! Review: Smooth Shifting, Even on Cold Starts - Great transmission fluid noticed an immediate difference after the change. My 6-speed shifts are much smoother, especially from 1st to 2nd and 2nd to 3rd. Even on cold starts, when the transmission used to feel a bit notchy, now it shifts like butter. ## Features - EXCELLENT - gear and synchro protection, balanced slipperiness for easier shifting in cold climates - ALSO USED WITH - manual transmissions and transaxles like T-5, T-45, T-56 and late-model BMW, provides a GL-4 level of gear protection - MOST VERSATILE ATF - use where Dexron III, Dexron II, Mercon and Mercon V fluids are recommended, for use in automatic, manual transmissions and power steering - POPULAR TRANSMISSION FLUID FOR - Toyota Type T-III and T-IV, Honda ATF-Z1, Nissan Matic D, J & K, Diamond SP-II, SP-III, Mazda ATF M-V, most BMW and Audi/VW automatic transmissions - WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000CPI5XM | | Best Sellers Rank | #41,353 in Automotive ( See Top 100 in Automotive ) #49 in Automotive Transmission Fluids | | Brand | Red Line | | Brand Name | Red Line | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 1,041 Reviews | | Global Trade Identification Number | 00083522305044 | | Item Form | Oil | | Item Weight | 771 g | | Item weight | 771 g | | Liquid Volume | 0.95 Liters | | Liquid volume | 0.95 Liters | | Manufacturer | Red Line | | Material | Synthetic | | Model Number | RED30504 | | Number of Items | 1 | | Package information | Bottle | | Part Interchange Info | 30504 | | Part Number | 30504 | | Recommended Uses For Product | For use in automatic and manual transmissions, power steering, racing transmissions | | Recommended uses for product | For use in automatic and manual transmissions, power steering, racing transmissions | | SAE J300 Viscosity Grade | 5W | | Specific Uses For Product | Automatic and Manual Transmissions, Power Steering | | UPC | 083522305044 | | Unit Count | 1 Count | | Viscosity | 5w | ## Product Details - **Brand:** Red Line - **Item weight:** 771 g - **Liquid volume:** 0.95 Liters - **Material:** Synthetic - **Package information:** Bottle ## Images ![30504 D4 Synthetic Automatic Transmission Fluid (ATF) - 1 Quart - Image 1](https://m.media-amazon.com/images/I/61ttowW8L7L.jpg) ## Questions & Answers **Q: Is this d4 atf fluid work on 2002 lexus ls430** A: yes **Q: Is it better to use Lubegard 63010 Platinum Universal ATF Protectant with this ATF?** A: Lubegard additives are safe with all fluids except for CVT Transmissions, and Ford type F. Their products are very good. LG Platinum is designed to meet mfg approval specs for ATF without approval codes on a PROPER base ATF fluid. I just did an Auto trans service on a 2000 Jetta TDi.(supposedly sealed and need no service for life) Yeah right. I changed the Trans filter, and pan gasket, and Side Cover gasket. I refilled with 3.5L Ravenol full synth ATF it's already fully compliant ATF with VW specs and still added LG Platinum just to keep things inside good. (seals, valves moving etc.) Tranny has 287K on it, expect to get at least 150K or more out of it now. **Q: Is this compatable with a Honda Accord 2000 LX Automatic Transmission?** A: That transmission should call for ATF Z1. Red Line recommends for this spec, so you shouldn't have a problem with using D4 in your Accord.Here's a link: http://www.redlineoil.com/product.aspx?pid=51&pcid=9 **Q: Can anyone say if I can use this on a mazda 3 2010 model automatic transmission with a manuel overdrive?** A: I'm using Red Line D4 in my 2011 3S 2.5L since 2011 no issues even in low 15 degree temps. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent produit ! *by L***P on 6 August 2025* Très bon produit, j'utilise ce produit exclusivement pour ma Corvette C6 depuis longtemps ! ### ⭐⭐⭐⭐⭐ Smooth Shifting, Even on Cold Starts *by G***S on 25 April 2026* Great transmission fluid noticed an immediate difference after the change. My 6-speed shifts are much smoother, especially from 1st to 2nd and 2nd to 3rd. Even on cold starts, when the transmission used to feel a bit notchy, now it shifts like butter. ### ⭐⭐⭐⭐⭐ Good *by G***Y on 26 September 2020* Matches 955 Cayenne transfer case fluid specs. ## Frequently Bought Together - Red Line 30504 D4 Synthetic Automatic Transmission Fluid (ATF) - 1 Quart - Red Line 57904 75W90 GL-5 Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart - Slippery Pete - Fluid Pump for Standard Quart Bottles - 8cc per Pump Stroke and 3rd Hand Adapter, Transfer Gear Oil, Transmission and Differential Fluid (28mm) --- ## 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.hk/products/276938146-30504-d4-synthetic-automatic-transmission-fluid-atf-1-quart](https://www.desertcart.hk/products/276938146-30504-d4-synthetic-automatic-transmission-fluid-atf-1-quart) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-07-10*