---
product_id: 375895066
title: "Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles"
brand: "archoil"
price: "$130.32"
currency: USD
in_stock: true
reviews_count: 13
category: "Archoil"
url: https://www.desertcart.us/products/375895066-archoil-ar6500-diesel-treatment-40-ounces-treats-400-gallons-additive
store_origin: US
region: United States of America
---

# Treats 400 gallons per 40 oz Boosts cetane by +8 points Improves lubricity by 43% Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles

**Brand:** archoil
**Price:** $130.32
**Availability:** ✅ In Stock

## Summary

> 🚀 Unlock your diesel’s hidden power and efficiency—because your ride deserves the upgrade.

## Quick Answers

- **What is this?** Archoil AR6500 Diesel Treatment (40 Ounces) - Treats 400 Gallons - Additive for All Diesel Vehicles by archoil
- **How much does it cost?** $130.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/375895066-archoil-ar6500-diesel-treatment-40-ounces-treats-400-gallons-additive)

## 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

- • **Injector & Turbo Cleaner:** Detergent formula removes deposits, restoring injector spray patterns and turbo responsiveness for sharper acceleration.
- • **Power & Efficiency Amplifier:** Boosts cetane up to +8 points for faster ignition and smoother combustion, unlocking hidden horsepower and MPG gains.
- • **Effortless Every Fill-Up Fuel Care:** Add directly with the long neck & measuring chamber for precise dosing—no guesswork, just peak performance.
- • **DPF Defender & Regeneration Reducer:** Keeps your Diesel Particulate Filter cleaner longer, cutting down costly regen cycles and extending component life.
- • **Universal Diesel Engine Compatibility:** Works seamlessly with all diesel vehicles and equipment, including modern HPCR systems—one solution for your entire fleet.

## Overview

Archoil AR6500 Diesel Treatment is a premium additive designed to treat up to 400 gallons of diesel fuel per 40 oz bottle. It enhances fuel lubricity by 43%, boosts cetane levels by up to 8 points for improved ignition and combustion, and cleans injectors and turbo components to restore performance. Compatible with all diesel engines, including modern HPCR systems, it also supports Diesel Particulate Filter health by reducing deposit buildup and regeneration frequency, resulting in better fuel economy, smoother acceleration, and extended engine life.

## Description

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

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.
Review: Great product - Works well in our diesel pickup

## Features

- EASY USE AT EVERY FILL-UP: Add directly to the fuel tank at each fill-up. The long neck and measuring chamber make treating fuel simple. One 40 oz bottle treats up to 400 gallons
- FOR ALL DIESEL ENGINES: Suitable for use in all diesel vehicles and equipment - light-duty, heavy-duty, pickup, SUV, van, RV, etc. (including modern HPCR systems)
- IMPROVES LUBRICITY (ASTM D6079): Tested to improve lubricity by 43% to help protect fuel system components, including wear-sensitive parts like the CP4 pump
- BOOSTS CETANE UP TO +8: Raises cetane up to 8 points for faster ignition, smoother combustion, and improved drivability; many engines run best around 48–50 while pump diesel is often 40–45
- CLEANS INJECTORS: AR6500's detergent package removes injector deposits and restores spray patterns for improved atomization, supporting better performance and fuel economy
- SUPPORTS DPF & REDUCES REGENS: Targets deposit formation to help keep the DPF clean and reduce regeneration frequency – restores performance, fuel economy, and extends DPF lifespan
- KEEPS TURBO CLEAN: Helps reduce fuel soot and deposit formation that impacts turbo response, restoring boost and smoother acceleration

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09KS9JMDP |
| Best Sellers Rank | #189 in Automotive ( See Top 100 in Automotive ) #2 in Diesel Additives |
| Brand | Archoil |
| Customer Reviews | 4.7 4.7 out of 5 stars (3,161) |
| Date First Available | November 1, 2021 |
| Item Weight | 2.95 pounds |
| Item model number | AR6500-40 |
| Manufacturer | Archoil |
| Manufacturer Part Number | AR6500-40 |
| Package Dimensions | 13.15 x 7.36 x 3.35 inches |

## Images

![Archoil 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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Great product
*by J***Y on February 25, 2026*

Works well in our diesel pickup

### ⭐⭐⭐⭐⭐ Works Great
*by J***L on February 15, 2026*

Been using it for almost a year now. I definitely get better gas mileage and when i don’t run my truck with it, i can definitely tell the difference. Highly recommend

## 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

---

## 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.us/products/375895066-archoil-ar6500-diesel-treatment-40-ounces-treats-400-gallons-additive](https://www.desertcart.us/products/375895066-archoil-ar6500-diesel-treatment-40-ounces-treats-400-gallons-additive)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-16*