--- product_id: 203341010 title: "Archoil Diesel Fuel System Kit - AR6400-D (12 oz) + AR6500 (40 oz) - Complete Restoration For All Diesel Engines, Injector Cleaner, Lubricity Improver, DPF & Turbo Deposit Control, Cetane Booster" brand: "archoil" price: "€ 149.99" currency: EUR in_stock: true category: "Archoil" url: https://www.desertcart.pt/products/203341010-archoil-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500 store_origin: PT region: Portugal --- # Boosts cetane by up to +8 points Two-step deep clean + maintenance Improves lubricity by 43% Archoil Diesel Fuel System Kit - AR6400-D (12 oz) + AR6500 (40 oz) - Complete Restoration For All Diesel Engines, Injector Cleaner, Lubricity Improver, DPF & Turbo Deposit Control, Cetane Booster **Brand:** archoil **Price:** € 149.99 **Availability:** βœ… In Stock ## Summary > πŸ”₯ Unlock your diesel’s full potential β€” clean, protect, and power up every mile! ## Quick Answers - **What is this?** Archoil Diesel Fuel System Kit - AR6400-D (12 oz) + AR6500 (40 oz) - Complete Restoration For All Diesel Engines, Injector Cleaner, Lubricity Improver, DPF & Turbo Deposit Control, Cetane Booster by archoil - **How much does it cost?** € 149.99 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/203341010-archoil-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500) ## Best For - archoil enthusiasts ## Why This Product - Trusted archoil brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **DPF Support & Reduced Regens:** Keeps diesel particulate filters cleaner, cutting down costly regeneration cycles - β€’ **Injector & Turbo Restoration:** Eliminates deposits to restore injector spray patterns and turbo responsiveness - β€’ **Complete Two-Step Diesel Reset:** Deep clean with AR6400-D, then maintain with AR6500 for peak engine health - β€’ **Universal Diesel Compatibility:** Works seamlessly with all diesel engines, including modern HPCR systems and biodiesel blends - β€’ **Fuel System Protection & Efficiency:** Boosts cetane for faster ignition and improves lubricity to extend fuel system life ## Overview The Archoil Diesel Fuel System Kit combines a powerful 2-step cleaning and maintenance solution designed for all diesel engines. It removes injector and turbo deposits, boosts cetane by up to 8 points for smoother combustion, and improves lubricity by 43% to protect critical fuel system components. Compatible with biodiesel blends and modern HPCR systems, it also supports DPF cleanliness to reduce regeneration frequency, ensuring enhanced performance, fuel economy, and engine longevity. ## Description Buy Archoil Diesel Fuel System Kit - AR6400-D (12 oz) + AR6500 (40 oz) - Complete Restoration For All Diesel Engines, Injector Cleaner, Lubricity Improver, DPF & Turbo Deposit Control, Cetane Booster on desertcart.com βœ“ FREE SHIPPING on qualified orders ## Features - TWO-STEP FUEL SYSTEM RESET: Includes AR6400-D Diesel Fuel System Cleaner + AR6500 Diesel Treatment (40 oz) for a complete clean-and-maintain solution - HOW IT WORKS: Use AR6400-D first for a deep clean (12 oz treats 30-40 gallons), then use AR6500 at every fill-up for ongoing protection (40 oz treats up to 400 gallons) - FOR ALL DIESEL ENGINES: Suitable for all diesel vehicles and equipment, including modern HPCR systems - CLEANS INJECTORS & RESTORES RESPONSE: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion - IMPROVES LUBRICITY (ASTM D6079): AR6500 is tested to improve lubricity by 43% to protect fuel system components, including wear-sensitive parts like the CP4 pump - BOOSTS CETANE UP TO +8: AR6500 raises cetane up to 8 points for faster ignition, smoother combustion, and improved drivability - SUPPORTS DPF & REDUCES REGENS: Targets deposit formation to help keep the DPF clean and reduce regeneration frequency - supporting performance and fuel economy - KEEPS TURBO CLEAN: Reduces deposit formation that impacts turbo response for restored boost and smoother acceleration ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B087JSLFNC | | ASIN | B087JSLFNC | | Best Sellers Rank | #448 in Automotive ( See Top 100 in Automotive ) #3 in Diesel Additives | | Brand Name | Archoil | | Capacity | 40 fluid ounces | | Customer Reviews | 4.8 4.8 out of 5 stars (2,968) | | Date First Available | April 23, 2020 | | Item Volume | 52 fluid ounces | | Manufacturer | Archoil | | Manufacturer | Archoil | | Number of Items | 2 | | Package Dimensions | 14.61 x 7.28 x 5.31 inches; 3.79 pounds | | Part Number | AR-FSK | | Size | 1 Count (Pack of 2) | | UPC | 608819243825 | | Unit Count | 52 Ounce | ## Product Details - **Brand:** Archoil - **Item Volume:** 52 fluid ounces - **Manufacturer:** Archoil - **Number of Items:** 2 - **Unit Count:** 52 Ounce ## Images ![Archoil Diesel Fuel System Kit - AR6400-D (12 oz) + AR6500 (40 oz) - Complete Restoration For All Diesel Engines, Injector Cleaner, Lubricity Improver, DPF & Turbo Deposit Control, Cetane Booster - Image 1](https://m.media-amazon.com/images/I/718fYxuEW0L.jpg) ## Questions & Answers **Q: Can I use the Diesel Fuel System Kit in my vehicle?** A: Suitable for use in all diesel vehicles, including pre-emissions vehicles and modern high pressure common-rail engines. **Q: Should I use AR6400-D and AR6500 in the same tank of fuel?** A: For best results, use AR6400-D in the first tank of fuel (deep clean). Then start AR6500 at the next fill-up and continue at following fill-ups. **Q: How often should I use AR6400-D Diesel Fuel System Cleaner?** A: Use every 5,000 miles or as required based on symptoms (declining performance, poor MPG, smoke, etc.) **Q: Can the Diesel Fuel System Kit be used with biodiesel blends?** A: Yes, Archoil's diesel treatments are compatible with biodiesel blends. ## Frequently Bought Together - Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner - Rislone 4784 DEF Crystal Cleanβ„’ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz - Rislone 4780 Diesel DEF Treatment | Prevents AdBlue/DEF Fluid Crystallization, 8 oz --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/203341010-archoil-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500](https://www.desertcart.pt/products/203341010-archoil-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-11-10*