---
product_id: 278708533
title: "AR6500 Diesel Treatment (40 oz) Two Pack - Treats 800 Gallons - Additive for All Diesel Vehicles"
price: "1502 kr"
currency: DKK
in_stock: true
reviews_count: 8
url: https://www.desertcart.dk/products/278708533-ar6500-diesel-treatment-40-oz-two-pack-treats-800-gallons
store_origin: DK
region: Denmark
---

# Boosts cetane for power & response Treats 800 gallons diesel Cleans & protects fuel system AR6500 Diesel Treatment (40 oz) Two Pack - Treats 800 Gallons - Additive for All Diesel Vehicles

**Price:** 1502 kr
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** AR6500 Diesel Treatment (40 oz) Two Pack - Treats 800 Gallons - Additive for All Diesel Vehicles
- **How much does it cost?** 1502 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/278708533-ar6500-diesel-treatment-40-oz-two-pack-treats-800-gallons)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Double Pack, Double Value:** Get twice the treatment in one purchase—because your diesel deserves premium care every time.
- • **Power Up with Cetane Boost:** Experience enhanced throttle response and increased horsepower with advanced combustion modifiers.
- • **Maximize Your Diesel Mileage:** Two 40 oz bottles treat up to 800 gallons, keeping your engine running longer and stronger.
- • **Protect & Clean Fuel Systems:** Safeguard your high-pressure common rail (HPCR) system from wear and deposits for peak performance.
- • **Future-Proof Your Diesel Engine:** Formulated specifically for modern diesel fuels to tackle today’s toughest fuel challenges.

## Overview

Archoil AR6500 Diesel Treatment Two Pack delivers advanced fuel system cleaning, lubrication, and cetane boosting technology designed for all diesel vehicles. Each 40 oz bottle treats up to 400 gallons, combining to treat 800 gallons total. It enhances power, throttle response, and protects modern diesel engines including HPCR systems, ensuring optimal performance and longevity.

## Description

Buy Archoil AR6500 Diesel Treatment (40 oz) Two Pack - Treats 800 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

- Includes (2) x AR6500 Diesel Treatment - Treat up to 800 gallons
- Formulated to address issues with modern diesel fuels
- 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 |
|---------------|-------|
| Manufacturer | Archoil |
| Brand | Archoil |
| Model | AR6500 Diesel Treatment Two Pack |
| Item Weight | 6.38 pounds |
| Product Dimensions | 6 x 6 x 10 inches |
| Item model number | AR6500-TP |
| Manufacturer Part Number | AR6500-TP |

## Images

![AR6500 Diesel Treatment (40 oz) Two Pack - Treats 800 Gallons - Additive for All Diesel Vehicles - Image 1](https://m.media-amazon.com/images/I/71HBIERvMYL.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 (40.6oz) Two Pack - Treats 800 Gallons - Additive for All Diesel Vehicles
- Archoil AR6400-D Diesel Fuel System Cleaner (Two Pack) - Cleans Injectors, Turbo & DPF
- Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-01*