---
product_id: 375895066
title: "AR6500 Diesel Treatment"
brand: "archoil"
price: "A$129"
currency: AUD
in_stock: null
reviews_count: 8
url: https://www.desertcart.com.au/products/375895066-ar6500-diesel-treatment
store_origin: AU
region: Australia
---

# Boosts cetane for power & response Cleans post-combustion system 40 oz treats 400 gallons AR6500 Diesel Treatment

**Brand:** archoil
**Price:** A$129
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Drive smarter, not harder — unleash peak diesel performance!

## Quick Answers

- **What is this?** AR6500 Diesel Treatment by archoil
- **How much does it cost?** A$129 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/375895066-ar6500-diesel-treatment)

## 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

- • **Turbo & DPF Savior:** The only additive that cleans post-combustion components, preventing costly failures.
- • **Maximize Every Drop:** Treats up to 400 gallons per 40 oz bottle for long-lasting performance.
- • **Power & Efficiency Boost:** Incorporates advanced combustion modifiers and cetane boosters for sharper throttle response.
- • **Complete Fuel System Care:** Cleans, lubricates, and protects high-pressure common rail (HPCR) systems for durability.
- • **Engineered for Modern Diesels:** Specifically formulated to tackle issues with today’s diesel fuels and restore MPG.

## Overview

Archoil AR6500 Diesel Treatment is a 40 oz additive designed to treat up to 400 gallons of diesel fuel. It uniquely cleans post-combustion systems like turbos and DPFs, boosts cetane for improved power and throttle response, and protects the entire fuel system including HPCR components, ensuring enhanced fuel economy and engine longevity for all diesel vehicles.

## Description

Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles

## 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 |
|---------------|-------|
| Manufacturer | Archoil |
| Brand | Archoil |
| Item Weight | 3.01 pounds |
| Package Dimensions | 14.17 x 7.83 x 3.54 inches |
| Item model number | AR6500-40 |
| Manufacturer Part Number | AR6500-40 |

## Images

![AR6500 Diesel Treatment - 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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Excellent product
*by B***N on September 9, 2025*

Keeps fuel system clean, improves power and mileage.

### ⭐⭐⭐⭐⭐ It works.. nuff said!?
*by P***R on July 2, 2025*

Maybe there is such a thing as a mechanic in a can.I bought a Dodge RAM 2500 5.9 Cummins.It has 218k on it. I live off grid and drive 5.5 miles of slow going, country gravel road to get to my place. I felt the stutter in the engine going around curves and up hills at low speed and RPM. At this time I averaged 15.5 MPG on the factory digital display.I heard about this stuff from an old time that started using it in his old 99 RAM. I took his advice, and started using the full 3 part treatment . I've been consistently using all 3 products for more than a year now. I do the boost dose, 2oz per 10 gallons of diesel. My fuel economy has increased to average 17.4 MPG reading, there is absolutely no stutter at any speed or RPM. I'm NOT a mechanic, but I know a better running truck when I see it and drive it. I've got 248K now and this truck runs far better than it did the day I bought it thanks to a little TLC and the Archoil line.

## 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 Australia*
*Store origin: AU*
*Last updated: 2026-01-29*