---
product_id: 203341010
title: "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: "¥27872"
currency: JPY
in_stock: true
category: "Archoil"
url: https://www.desertcart.jp/products/203341010-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500-40
store_origin: JP
region: Japan
---

# Boosts cetane by up to +8 points Two-step deep clean + maintenance Improves lubricity by 43% 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:** ¥27872
**Availability:** ✅ In Stock

## Summary

> 🚀 Unlock your diesel’s full potential with every drop!

## Quick Answers

- **What is this?** 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?** ¥27872 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/203341010-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500-40)

## 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

- • **DPF & Turbo Deposit Control:** Keeps diesel particulate filters cleaner and turbochargers performing at their best, reducing costly regens
- • **Complete Two-Step Diesel Reset:** Deep clean with AR6400-D, then maintain with AR6500 for peak engine health
- • **Universal Diesel Engine Compatibility:** Works seamlessly with all diesel engines, including modern HPCR systems
- • **Injector Restoration & Performance Boost:** Removes deposits to restore injector spray patterns for smoother, more responsive driving
- • **Enhanced Lubricity & Component Protection:** Proven 43% lubricity improvement to safeguard sensitive fuel system parts like CP4 pumps

## Overview

The Archoil Diesel Fuel System Kit combines a powerful two-step cleaning and maintenance formula designed for all diesel engines. It deep cleans injectors, boosts cetane by up to 8 points for faster ignition, improves lubricity by 43% to protect fuel system components, and controls deposits in DPF and turbo systems—ensuring smoother acceleration, better fuel economy, and longer engine life.

## 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 ✓ 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 | #422 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 (2,812) |
| Date First Available  | April 23, 2020 |
| Item Volume | 976 ml |
| Manufacturer | Archoil |
| Manufacturer  | Archoil |
| Number of Items | 2 |
| Package Dimensions  | 13.62 x 7.68 x 5.39 inches; 3.81 pounds |
| Part Number | AR-FSK |
| Size | 1 Count (Pack of 2) |
| UPC | 608819243825 |
| Unit Count | 52 Ounce |

## Product Details

- **Brand:** Archoil
- **Item Volume:** 976 ml
- **Manufacturer:** Archoil
- **Number of Items:** 2
- **Unit Count:** 52 Ounce

## Images

![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 Clean™ 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?

- 🛒 **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.jp/products/203341010-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500-40](https://www.desertcart.jp/products/203341010-diesel-fuel-system-kit-ar6400-d-12-oz-ar6500-40)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-24*