--- product_id: 670424488 title: "Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40.6 oz) + AR6400-D Diesel Fuel System Cleaner" brand: "archoil" price: "Β₯34488" currency: JPY in_stock: true category: "Archoil" url: https://www.desertcart.jp/products/670424488-archoil-diesel-fuel-system-kit-ar6500-diesel-treatment-40-6 store_origin: JP region: Japan --- # Boosts cetane +8 for peak combustion Extends DPF regen intervals by +180 miles Restores injectors, turbo & DPF efficiency Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40.6 oz) + AR6400-D Diesel Fuel System Cleaner **Brand:** archoil **Price:** Β₯34488 **Availability:** βœ… In Stock ## Summary > πŸš€ Unlock your diesel’s hidden power and efficiency β€” don’t get left behind! ## Quick Answers - **What is this?** Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40.6 oz) + AR6400-D Diesel Fuel System Cleaner by archoil - **How much does it cost?** Β₯34488 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/670424488-archoil-diesel-fuel-system-kit-ar6500-diesel-treatment-40-6) ## 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€’ **Maximize Every Mile:** Boosts fuel economy by up to +1.0 MPG for smarter drives - β€’ **Trusted by Diesel Pros:** Proven to extend DPF regeneration intervals by up to 180 miles, reducing downtime - β€’ **Two-Step Precision Care:** Start with AR6400-D cleaner, then maintain with AR6500 treatment for ongoing gains - β€’ **Protect Critical Components:** Enhances lubricity by 43% to safeguard CP4 pumps and injectors - β€’ **Turbocharge Your Diesel Performance:** Deep-cleans fuel system deposits for instant power revival ## Overview The Archoil Diesel Fuel System Kit combines a powerful 12 oz AR6400-D cleaner with a 40 oz AR6500 treatment to deep-clean and maintain diesel fuel systems. It restores injector, turbo, and DPF performance, boosts cetane by up to +8, improves fuel economy by up to 1 MPG, and extends DPF regeneration intervals by as much as 180 miles. Suitable for all diesel engines, this two-step system is a must-have for professionals seeking peak diesel efficiency and longevity. ## Description Archoil Diesel Fuel System Kit combines AR6400-D Diesel Fuel System Cleaner with AR6500 Diesel Treatment to deliver a complete clean-and-maintain solution. Rapidly restore performance first, then upgrade fuel quality at every fill-up to maximize performance. How it works (simple 2-step process): Start with AR6400-D to deep-clean performance-robbing deposits. Pour one 12 oz bottle into the fuel tank and drive normally; one bottle treats 30-40 gallons of diesel. After the cleaning step, switch to AR6500 at every fill-up for ongoing protection and performance improvements. One 40 oz bottle treats up to 400 gallons of diesel fuel. Why it works: AR6400-D is a concentrated diesel fuel system cleaner designed for quick results - especially when response feels sluggish, idle becomes rough, or fuel economy (MPG) has dropped. AR6500 is the everyday diesel fuel additive that keeps improving fuel quality tank after tank with detergent cleaning, cetane boost (up to +8), and lubricity improvement (ASTM D6079 43%) to help protect wear-sensitive components like the CP4 pump. Together, they support smoother running, improved response, more efficient combustion, and reduced deposit formation that improves turbo response and DPF function. For all diesel engines: Suitable for all diesel vehicles and equipment, including modern HPCR (high pressure common rail) systems. Ideal for light-duty and heavy-duty diesels such as pickups, SUVs, vans, RVs, work trucks, and diesel equipment. ## Features - Includes AR6500 Diesel Treatment (40 oz) - Includes AR6400-D Diesel Fuel System Cleaner - Restore key fuel system components - injectors, turbo & dpf - Boost cetane, improve performance and MPG - AR6400-D is not the remedy for HEUI injector stiction. Please use AR9100 Friction Modifier instead ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B087JSLFNC | | Brand Name | Archoil | | Capacity | 40 Fluid ounces | | Customer Reviews | 4.8 4.8 out of 5 stars (2,854) | | Item Volume | 976 Milliliters | | Manufacturer | Archoil | | Number of Items | 2 | | Part Number | AR-FSK | | Size | 1 Count (Pack of 2) | | UPC | 608819243825 | | Unit Count | 2 Count | ## Product Details - **Brand:** Archoil - **Item volume:** 976 Milliliters - **Manufacturer:** Archoil - **Number of Items:** 2 - **Unit count:** 2 Count ## Images ![Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40.6 oz) + AR6400-D Diesel Fuel System Cleaner - 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.jp/products/670424488-archoil-diesel-fuel-system-kit-ar6500-diesel-treatment-40-6](https://www.desertcart.jp/products/670424488-archoil-diesel-fuel-system-kit-ar6500-diesel-treatment-40-6) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-23*