---
product_id: 375895066
title: "AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles"
brand: "archoil"
price: "₩149420"
currency: KRW
in_stock: true
reviews_count: 13
category: "Archoil"
url: https://www.desertcart.kr/products/375895066-ar6500-diesel-treatment-40-ounces-treats-400-gallons-additive-all
store_origin: KR
region: South Korea
---

# Boosts cetane for power & response Cleans post-combustion system 40 oz treats 400 gallons AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles

**Brand:** archoil
**Price:** ₩149420
**Availability:** ✅ In Stock

## Summary

> 🚛 Fuel smarter, drive stronger — don’t let your diesel fall behind!

## Quick Answers

- **What is this?** AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles by archoil
- **How much does it cost?** ₩149420 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/375895066-ar6500-diesel-treatment-40-ounces-treats-400-gallons-additive-all)

## 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

- • **Routine Ready:** Designed for use at every fill-up to keep your diesel running smoother, quieter, and stronger.
- • **Maximize Every Drop:** One 40 oz bottle treats up to 400 gallons, making every fill-up count.
- • **Fuel System Guardian:** Lubricates and protects high-pressure common rail (HPCR) systems for long-term engine health.
- • **Turbocharge Your Diesel:** Unique formula cleans turbo and DPF systems to prevent costly failures and reduce downtime.
- • **Power & Efficiency Unleashed:** Proprietary combustion modifier and cetane boost deliver noticeable MPG gains and throttle response.

## Overview

Archoil AR6500 Diesel Treatment is a premium 40 oz additive that treats up to 400 gallons of diesel fuel. It uniquely cleans the post-combustion system including turbochargers and DPFs, boosts cetane for enhanced power and throttle response, and lubricates critical fuel system components. Trusted by thousands with a 4.7-star rating, it’s engineered for regular use to restore performance, improve fuel economy, and extend engine life across all diesel vehicles.

## Description

Buy Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles: Automotive - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Noticeable Performance Boost & Smoother Diesel Operation 🚛🔥 - The Archoil AR6500 Diesel Treatment is hands down one of the best diesel additives I’ve used. After adding it, I noticed smoother engine operation, quieter idle, and improved throttle response almost immediately ⚙️✨. The fact that the two-pack treats up to 800 gallons makes it a great value, especially for regular diesel use. It gives peace of mind knowing it helps with injector cleanliness, fuel system protection, and overall efficiency 🛢️💪. Easy to use, high quality, and delivers real results—this is now a staple for my diesel maintenance routine! 👍🚀
Review: Legit works! Boosted mpg, range, and power - I suspect my Audi 3.0 TDI had a clogged cat some 5 years after a DPF delete back in 2019. MPG was down and it felt like it was also down on power. Sometimes the "Italian Tune-up" (high rev driving) would briefly help by blowing a lot of crap out the back, but it would go back to reduced after a day or two. I had been using the Hotshots Every Day in each fill-up, which may have slowed this issue down but it still happened. I also tried Opti-Lube XPD for a few months. Not much, if any, improvement. I do suspect they helped improve cetane values, but idk what else. If I had a good run, I was getting ~560 miles per tank. After some YouTube videos, I decided to try Archoil. I didn't notice anything for a couple fill-ups, but after about 1-1.5 months, I started to notice some slight improvements in mileage to/from work and some other trips. It was getting hard to hit 30 mpg on the way to work, whereas I started hitting 31-32, even with significant traffic. After 2 months, there has been a definite improvement. I'm currently seeing 33+ mpg on the way to work (same conditions as before) and reaching closer to the 38 mpg EPA advertised on my way home. I've also hit 42 mpg coming home from a friends' house, whereas before it was struggling to hit 39. Power feels like it has returned to expected levels compared to the previous treatments. My range is now reporting >600 miles per tank, even dealing with some stop and go traffic. For the results, price, and ease of applying into the tank, I highly recommend using it and I intend to continue using this from hereon out.

## Features

- 40 oz bottle treats 400 gallons - Use at every fill-up
- Formulated to address issues with modern diesel fuels to restore and maximize performance and fuel economy (MPG)
- The only diesel treatment to clean the post-combustion system (turbo, DPF) to prevent premature failure and reduce regeneration frequency
- Incorporates Archoil's proven combustion modifier technology and a strong cetane boost to increase power and response
- Cleans, lubricates and protects your fuel system (including HPCR systems)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09KS9JMDP |
| Best Sellers Rank | #161 in Automotive ( See Top 100 in Automotive ) #2 in Diesel Additives |
| Brand | Archoil |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,973) |
| Date First Available | November 1, 2021 |
| Item Weight | 2.99 pounds |
| Item model number | AR6500-40 |
| Manufacturer | Archoil |
| Manufacturer Part Number | AR6500-40 |
| Package Dimensions | 13.3 x 7.8 x 3.46 inches |

## Images

![AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles - Image 1](https://m.media-amazon.com/images/I/61PN0hNSMfL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can it be used in my vehicle?**
A: AR6500 is suitable for use in all diesel vehicles, including newer systems such as High Pressure Common Rail.

**Q: What's the difference between AR6500 Diesel Treatment and AR6400-D Diesel Fuel System Cleaner?**
A: AR6400-D is a one-tank treatment that rapidly deep cleans the entire fuel system. AR6500 is a on-going maintainance treatment that improves fuel quality at every fill-up. For best results, use both with the Diesel Fuel System Kit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Noticeable Performance Boost & Smoother Diesel Operation 🚛🔥
*by M***A on December 29, 2025*

The Archoil AR6500 Diesel Treatment is hands down one of the best diesel additives I’ve used. After adding it, I noticed smoother engine operation, quieter idle, and improved throttle response almost immediately ⚙️✨. The fact that the two-pack treats up to 800 gallons makes it a great value, especially for regular diesel use. It gives peace of mind knowing it helps with injector cleanliness, fuel system protection, and overall efficiency 🛢️💪. Easy to use, high quality, and delivers real results—this is now a staple for my diesel maintenance routine! 👍🚀

### ⭐⭐⭐⭐⭐ Legit works! Boosted mpg, range, and power
*by B***B on September 23, 2025*

I suspect my Audi 3.0 TDI had a clogged cat some 5 years after a DPF delete back in 2019. MPG was down and it felt like it was also down on power. Sometimes the "Italian Tune-up" (high rev driving) would briefly help by blowing a lot of crap out the back, but it would go back to reduced after a day or two. I had been using the Hotshots Every Day in each fill-up, which may have slowed this issue down but it still happened. I also tried Opti-Lube XPD for a few months. Not much, if any, improvement. I do suspect they helped improve cetane values, but idk what else. If I had a good run, I was getting ~560 miles per tank. After some YouTube videos, I decided to try Archoil. I didn't notice anything for a couple fill-ups, but after about 1-1.5 months, I started to notice some slight improvements in mileage to/from work and some other trips. It was getting hard to hit 30 mpg on the way to work, whereas I started hitting 31-32, even with significant traffic. After 2 months, there has been a definite improvement. I'm currently seeing 33+ mpg on the way to work (same conditions as before) and reaching closer to the 38 mpg EPA advertised on my way home. I've also hit 42 mpg coming home from a friends' house, whereas before it was struggling to hit 39. Power feels like it has returned to expected levels compared to the previous treatments. My range is now reporting >600 miles per tank, even dealing with some stop and go traffic. For the results, price, and ease of applying into the tank, I highly recommend using it and I intend to continue using this from hereon out.

### ⭐⭐⭐⭐⭐ Increased MPG
*by K***E on November 15, 2025*

Excellent product. Performs as stated

## Frequently Bought Together

- Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles
- Archoil AR9100 Friction Modifier Value Pack - Two 16oz Bottles of AR9100 for Two Powerstroke Treatments…
- Archoil AR6400-D Diesel Fuel System Cleaner (Two Pack) - Cleans Injectors, Turbo & DPF

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-01*