---
product_id: 203341010
title: "Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner"
brand: "archoil"
price: "566.08 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Archoil"
url: https://www.desertcart.tn/products/203341010-diesel-fuel-system-kit-ar6500-diesel-treatment-40-oz-ar6400
store_origin: TN
region: Tunisia
---

# Boosts cetane & MPG +0.5-1.0 mpg Extends DPF regen intervals +180 miles Restores injectors, turbo & DPF efficiency Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner

**Brand:** archoil
**Price:** 566.08 DT
**Availability:** ✅ In Stock

## Summary

> ⛽ Drive smarter, cleaner, and farther — don’t let your diesel fall behind!

## Quick Answers

- **What is this?** Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner by archoil
- **How much does it cost?** 566.08 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/203341010-diesel-fuel-system-kit-ar6500-diesel-treatment-40-oz-ar6400)

## 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

- • **Effortless Integration:** Simple add-to-fuel-tank application fits seamlessly into your maintenance routine.
- • **Engine Longevity Booster:** Nanoborate tech lubricates and protects injectors, turbo, and DPF from wear.
- • **Fuel Economy Game-Changer:** Experience up to 1 MPG boost for longer, cost-effective drives.
- • **Cleaner Combustion, Cleaner Air:** Reduces harmful emissions by removing carbon deposits and varnish.
- • **Extended Regeneration Intervals:** Drive up to 180 miles longer between costly DPF regen cycles.

## Overview

The Archoil Diesel Fuel System Kit combines the AR6500 Diesel Treatment and AR6400-D Cleaner to enhance diesel engine performance by improving fuel economy, restoring critical fuel system components, and extending DPF regeneration intervals by up to 180 miles. Featuring advanced nanoborate lubrication technology, this kit reduces engine wear, cleans carbon deposits, and lowers emissions, making it a trusted, easy-to-use solution for all diesel engines.

## Description

Buy Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner: Diesel Additives - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great stuff, lessens regeneration cycles. - There are two separate product reviews written below, but as a whole, I give this kit a 5-STAR review. 5-STARS This is a review on Archoil AR6500 Diesel Treatment. I am giving this product a 5-star review. This product decreased regen frequency from previous additive and also decreased frequency from baseline, which suggests that it may have cleaned the DPF to some degree or enhances combustion action to burn cleaner. This product extended more miles between regen intervals than previous additive used, and from baseline figure. I noticed an increase in mpg of 05-1.0 mpg one way in travel(downhill), and no signifigant change in uphill travel. I did not get any engine error codes while using this product. I used 7 ounces (high dose) with 35 gallons of fuel on one test, and on a second test I used 3.5 ounces (normal use) with 35 gallons of fuel. This is one of the most economical products to use with low ounce use per tank. No check engine lights came on. Vehicle showed no adverse affects from additive. Regen mileage interval with NO additives was 384 miles after receiving vehicle from repair shop. 1st test with double the normal dose at 7 ounces in 35 gallons of fuel: Mileage between regens decreased from 384 miles (baseline) to 362 miles(-22 mile decrease). The product that I used before Archoil was Cataclean. Archoil AR6500 product interval miles decreased from 414 miles (Cataclean), to 362 miles, a decrease of 52 miles. This test was a disappointment, as I was expecting more from Archoil AR6500 Diesel Treament. This is why I decided to perform a second test with normal dosage. 2nd test with normal dosage of 3.5 ounces in 35 gallons of fuel: Mileage between regens increased from 384 miles (baseline) to 564 miles (+180 miles increase). The product that I used before Archoil was Cataclean. Archoil AR6500 product interval miles increased with normal dose, from 414 miles using Cataclean, to 564 miles, an increase of +150 miles. This was the result that I was hoping for. Perhaps, use a high dose initially to clean, then use normal dose for regular use. Performance seemed to increase with less throttle input needed on acceleration or towing. So far in testing different additives, AR6500 is my favorite. Seafoam would be my second choice. The increase in DPF regen interval mileage and economy of use puts this product on top. There may be better, but I haven’t gotten there yet. Driving Notes: 32 miles driven during regeneration cycles (both tests) Soot down to 8 grams then 6 grams on second test EGTs = 556F temperature, normal highway driving EGTs = 675-700F temperature during regeneration cycle Injection quantity at idle at baseline=9mm Injection quantity at idle after AR6500=7mm #1 #2 #3 #4 #5 #6 #7 #8 Injector balance at baseline: -0.5, 0.1, -0.2, 0.9, -0.6, -0.1, 0.0, 0.4 Injector balance after additive: -0.6, 0.1, -0.1, 0.5, -1.1, 0.0, -0.1, 1.1 Less fuel being used at idle. Increase in mileage performance. Approx. +0.5-1.0 mpg Decrease in regeneration intervals: From baseline: longer distance between intervals +180 miles From previous additive (Cataclean): longer distance between intervals +150 miles Injector balance had mixed results between injectors. 4-STARS This is a review on Archoil AR6400-D Diesel Fuel System Cleaner. I am giving this product a 4-star review. This product increased regen frequency from previous additive but decreased frequency from baseline, which suggests that it may have cleaned the DPF to some degree or enhances combustion action to burn cleaner. This product lessened miles between regen intervals than previous additive (also Archoil product) used, but increased mileage form baseline figure. I did not notice any mileage changes. I did not get any engine error codes while using this product. No check engine lights came on. Vehicle showed no adverse affects from additive. Regen mileage interval with NO additives was 384 miles after receiving vehicle from repair shop. I used one 12 ounce bottle in 35 gallons of fuel. Mileage between regens increased from 384 miles (baseline) to 462 miles (+78 miles increase). The product that I used before AR6400-D was AR6500. Archoil AR6400-D product interval miles decreased, from AR6500 at 564 miles, to 462 miles, a decrease of -102 miles. Driving Notes: 43 miles driven during regeneration cycles Soot down to 7 grams EGTs = 556F temperature, normal highway driving EGTs = 685F temperature during regeneration cycle Injection quantity at idle at baseline=9mm Injection quantity at idle after AR6400-D=8mm #1 #2 #3 #4 #5 #6 #7 #8 Injector balance at baseline: -0.5, 0.1, -0.2, 0.9, -0.6, -0.1, 0.0, 0.4 Injector balance after additive: -1.0, 0.6, 0.2, 1.0, -0.8, 0.0, -0.1, 0.0 Less fuel being used at idle. Mileage remained about same as baseline Decrease in regeneration intervals: From baseline: longer distance between intervals +78 miles From previous additive (AR6400-D): shorter distance between intervals -102 miles Injector balance seemed relatively the same. My review is based on product efficiency, any damages to vehicle, check engine lights turning on or off, ability to clear engine codes (if my vehicle has any check engine lights), increase or decrease in mileage, and increase or decrease in regeneration mileage intervals. I will not use price as a factor. You will have determine if product is worth the cost. These products may or may not save you costly repairs or replacement. I cannot determine if these products can or will damage your vehicle. My vehicle has no check engine light or error codes. My vehicle is in good working order with no current issues during this review. My vehicle has over 200,000 miles. This is a stock vehicle, with a stock (OEM) factory tune installed. Just prior to this test, my truck was not performing a regen cycle. Repairs were done which included a new 9th injector, new DPF pressure monitor. The pressure monitor measures pressure before and after the DPF filter. The difference in pressure allow computer to estimate how much soot has accumulated in the DPF filter. A force regen was also performed on my vehicle and a passive regen performed before I received my vehicle from repair shop. Vehicle is performing as it should. Test drive is relatively the same and consistent. 49.5 miles one way, with a drive time of about 56 minutes. There is a gradual 1129 foot elevation gain one way and 1129 elevation loss the opposite way. There is some surface street driving, some freeway driving, and most of drive is highway. Hope this review helps. I will be writing more reviews on other diesel additives. I have some data from other additives for comparison listed below. Most products seemed to help and a couple seemed to worsened DPF performance during testing. You should not compare the towing data for comparison. I have just added it to show that towing will change data. Towing will increase exhaust gas temperatures and should make the DPF more effective. My regen mileage intervals increased, decreasing regen frequency, while towing. There are many factors that affect the DPF performance. The factors that I noticed (on my vehicle) are outside temperature, humidity, and EGTs. Lower temperatures decreased DPF performance. Higher humidity decreased DPF performance. Higher outside temperatures and lower humidity seem to increase DPF performance. Higher EGTs such as towing increased DPF performance. Longer driving distance seems helps the DPF filter as optimal temperatures are reached. It seems like soot accumulates faster when the engine and DPF filter are not warm/hot enough, and faster within the first 10-15 miles of travel. If you are only making short trips then the DPF will fill up faster and regens will be more frequent. Regeneration Interval Mileage Comparison of Different Additives: baseline (no additive), 384 miles between regeneration intervals Archoil AR6200 Fuel Treatment, 391 miles between regeneration intervals,+7 mile increase from baseline, +7 mile increase from previous additive(none, baseline) Wynn’s DPF Regenerator, 462miles between regeneration intervals, +78 mile increase from baseline, +71 mile increase from previous additive Seafoam (high dose), 504 miles between regeneration intervals, +120 mile increase from baseline, +42 mile increase from previous additive Nitrox Clean Cat Diesel, 324 miles between regeneration intervals, -60 mile decrease from baseline, -180 mile decrease from previous additive Archoil AR6500 pulling trailer in hot weather (not same comparison) , 1075 miles between regeneration intervals, +691 mile increase from baseline, +751 mile increase from previous additive Nitrox Clean Cat Diesel 2nd try, 402 miles between regeneration intervals, +18 mile increase from baseline, +78 mile increase from previous additive(Nitrox Clean Cat Diesel) Liqui Moly Diesel Purge, 265 miles between regeneration intervals, -119 mile decrease from baseline, -137 mile decrease from previous additive Wynn’s Turbo Cleaner, 298 miles between regeneration intervals, -86 mile decrease from baseline, +33 mile increase from previous additive Rislone Hy-Per Diesel, 323 miles between regeneration intervals, -61 mile decrease from baseline, +25 mile increase from previous additive Rislone DPF Clean, 323 miles between regeneration intervals, -61 mile decrease from baseline, 0 mile difference from previous additive Archoil AR6500 pulling trailer in hot weather one way, cooler temps coming back(2nd trip, different route) (not same comparison), 680 miles between regeneration intervals, +296 mile increase from baseline, +357 mile increase from previous additive Cataclean, 414 miles between regeneration interval, +30 increase from baseline, +26 mile increase from previous additive Archoil AR6500 Diesel Treatment, 564 miles between regeneration interval, +180 mile increase from baseline, +150 mile increase from previous additive Archoil AR6400-D Diesel Fuel System Cleaner, 462 miles between regeneration interval, +78 mile increase from baseline, -102 mile decrease from previous additive Archoil AR6500. Star Review Legend 1 star: Made check engine light turn on or trigger error code(s) 2 star: Causes no check engine warnings and no engine error codes. Mileage worsened or DPF regeneration intervals decreased in mileage. DPF regeneration process worsened. 3 star: gained less than 50 miles in regen mileage interval (from baseline or previous additive), or slight increase in mpg. 4 star: gained more than 50, but less than 100 miles in regen mileage interval (from baseline or previous additive), or +2 mpg increase 5 star: gained more than 100 miles in regen mileage interval (from baseline or previous additive), or +3 mpg increase.
Review: Optimize Performance and Efficiency - Archoil Diesel Fuel System Kit, consisting of the AR6500 Diesel Treatment (40.6 oz) and the AR6400-D Diesel Fuel System Cleaner, proves to be an exceptional combination for optimizing the performance and efficiency of diesel engines. With their advanced formulas and proven effectiveness, this kit deserves a five-star rating. The AR6500 Diesel Treatment is a powerful additive designed to enhance the performance of diesel engines. It improves fuel economy, reduces engine wear, and minimizes emissions. This treatment is formulated with state-of-the-art nanoborate technology, which provides superior lubrication and protects fuel system components from wear and tear. The AR6500 Diesel Treatment also helps to prevent fuel oxidation, corrosion, and the formation of deposits, ensuring a clean and efficient fuel system. The AR6400-D Diesel Fuel System Cleaner complements the AR6500 Diesel Treatment by thoroughly cleaning the fuel system. It removes carbon deposits, varnish, and other contaminants that can accumulate over time and negatively impact engine performance. By using the AR6400-D Diesel Fuel System Cleaner, you can restore power, improve fuel efficiency, and reduce harmful emissions. This cleaner is compatible with all diesel engines, including high-pressure common rail (HPCR) systems. Both products in the Archoil Diesel Fuel System Kit are easy to use. The AR6500 Diesel Treatment can be added directly to the fuel tank during refueling, and the AR6400-D Diesel Fuel System Cleaner is added to the fuel system before an oil change. Following the provided instructions ensures proper application and maximum benefits. One of the standout features of this fuel system kit is its proven track record. Archoil is a trusted brand known for its high-quality products, and the Diesel Fuel System Kit is no exception. Many users have reported noticeable improvements in engine performance, fuel efficiency, and overall drivability after using this kit. It is particularly effective in resolving common issues such as rough idle, sluggish acceleration, and excessive smoke. Another notable advantage of the Archoil Diesel Fuel System Kit is its long-lasting effects. The AR6500 Diesel Treatment provides ongoing protection and lubrication, ensuring sustained performance benefits. The AR6400-D Diesel Fuel System Cleaner's effects can last for thousands of miles, making it a cost-effective solution for maintaining a clean and efficient fuel system. Furthermore, this kit is safe for use in all diesel engines and has no adverse effects on engine components or emissions systems. It is compatible with all diesel fuels, including ultra-low sulfur diesel (ULSD) and biodiesel blends. In summary, the Archoil Diesel Fuel System Kit, consisting of the AR6500 Diesel Treatment and the AR6400-D Diesel Fuel System Cleaner, is a highly effective and reliable solution for optimizing the performance and efficiency of diesel engines. With their advanced formulas, proven effectiveness, ease of use, and long-lasting benefits, this kit deserves a five-star rating. Overall rating: ⭐⭐⭐⭐⭐

## Features

- Includes AR6500 Diesel Treatment (40 oz)
- Includes AR6400-D Diesel Fuel System Cleaner
- Restore key fuel system components - injectors, turbo & dpf
- Boost cetane, improve performance and MPG
- AR6400-D is not the remedy for HEUI injector stiction. Please use AR9100 Friction Modifier instead

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B087JSLFNC |
| Best Sellers Rank | #316 in Automotive ( See Top 100 in Automotive ) #4 in Diesel Additives |
| Brand | Archoil |
| Customer Reviews | 4.8 4.8 out of 5 stars (2,366) |
| Date First Available | April 23, 2020 |
| Item Weight | 3.81 pounds |
| Manufacturer | Archoil |
| Manufacturer Part Number | AR-FSK |
| Package Dimensions | 14.84 x 7.24 x 5.28 inches |

## Images

![Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner - Image 1](https://m.media-amazon.com/images/I/71fJHWGaN0L.jpg)

## Questions & Answers

**Q: Can it remove water, like k100d+ ?**
A: I doesn’t say anything on the bottle about it, this is geared more towards keeping the DPF clean, and it worked wonders on my Mercedes ML320 CDI for that, feels like I gained 100hp lol. Realistically probably 30-40ftlb in torque on the dog cleaner. The AR9500 is a good cetane boost, stiction fix, and injector cleaner geared more towards Ford HEUI injectiors on 6.0 and 7.3, but works great in any diesel.

**Q: Can this product be used in seni trucks? D-13 engine to be exact.**
A: yes, Our products work for all diesel engines

**Q: Does this product clean the egr valve as well?**
A: I’m not sure check their web site. I know it cleans everything else.

**Q: Can it be used for Standby Diesel Generator systems?**
A: Yes, all diesel engines

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great stuff, lessens regeneration cycles.
*by S***N on January 11, 2025*

There are two separate product reviews written below, but as a whole, I give this kit a 5-STAR review. 5-STARS This is a review on Archoil AR6500 Diesel Treatment. I am giving this product a 5-star review. This product decreased regen frequency from previous additive and also decreased frequency from baseline, which suggests that it may have cleaned the DPF to some degree or enhances combustion action to burn cleaner. This product extended more miles between regen intervals than previous additive used, and from baseline figure. I noticed an increase in mpg of 05-1.0 mpg one way in travel(downhill), and no signifigant change in uphill travel. I did not get any engine error codes while using this product. I used 7 ounces (high dose) with 35 gallons of fuel on one test, and on a second test I used 3.5 ounces (normal use) with 35 gallons of fuel. This is one of the most economical products to use with low ounce use per tank. No check engine lights came on. Vehicle showed no adverse affects from additive. Regen mileage interval with NO additives was 384 miles after receiving vehicle from repair shop. 1st test with double the normal dose at 7 ounces in 35 gallons of fuel: Mileage between regens decreased from 384 miles (baseline) to 362 miles(-22 mile decrease). The product that I used before Archoil was Cataclean. Archoil AR6500 product interval miles decreased from 414 miles (Cataclean), to 362 miles, a decrease of 52 miles. This test was a disappointment, as I was expecting more from Archoil AR6500 Diesel Treament. This is why I decided to perform a second test with normal dosage. 2nd test with normal dosage of 3.5 ounces in 35 gallons of fuel: Mileage between regens increased from 384 miles (baseline) to 564 miles (+180 miles increase). The product that I used before Archoil was Cataclean. Archoil AR6500 product interval miles increased with normal dose, from 414 miles using Cataclean, to 564 miles, an increase of +150 miles. This was the result that I was hoping for. Perhaps, use a high dose initially to clean, then use normal dose for regular use. Performance seemed to increase with less throttle input needed on acceleration or towing. So far in testing different additives, AR6500 is my favorite. Seafoam would be my second choice. The increase in DPF regen interval mileage and economy of use puts this product on top. There may be better, but I haven’t gotten there yet. Driving Notes: 32 miles driven during regeneration cycles (both tests) Soot down to 8 grams then 6 grams on second test EGTs = 556F temperature, normal highway driving EGTs = 675-700F temperature during regeneration cycle Injection quantity at idle at baseline=9mm Injection quantity at idle after AR6500=7mm #1 #2 #3 #4 #5 #6 #7 #8 Injector balance at baseline: -0.5, 0.1, -0.2, 0.9, -0.6, -0.1, 0.0, 0.4 Injector balance after additive: -0.6, 0.1, -0.1, 0.5, -1.1, 0.0, -0.1, 1.1 Less fuel being used at idle. Increase in mileage performance. Approx. +0.5-1.0 mpg Decrease in regeneration intervals: From baseline: longer distance between intervals +180 miles From previous additive (Cataclean): longer distance between intervals +150 miles Injector balance had mixed results between injectors. 4-STARS This is a review on Archoil AR6400-D Diesel Fuel System Cleaner. I am giving this product a 4-star review. This product increased regen frequency from previous additive but decreased frequency from baseline, which suggests that it may have cleaned the DPF to some degree or enhances combustion action to burn cleaner. This product lessened miles between regen intervals than previous additive (also Archoil product) used, but increased mileage form baseline figure. I did not notice any mileage changes. I did not get any engine error codes while using this product. No check engine lights came on. Vehicle showed no adverse affects from additive. Regen mileage interval with NO additives was 384 miles after receiving vehicle from repair shop. I used one 12 ounce bottle in 35 gallons of fuel. Mileage between regens increased from 384 miles (baseline) to 462 miles (+78 miles increase). The product that I used before AR6400-D was AR6500. Archoil AR6400-D product interval miles decreased, from AR6500 at 564 miles, to 462 miles, a decrease of -102 miles. Driving Notes: 43 miles driven during regeneration cycles Soot down to 7 grams EGTs = 556F temperature, normal highway driving EGTs = 685F temperature during regeneration cycle Injection quantity at idle at baseline=9mm Injection quantity at idle after AR6400-D=8mm #1 #2 #3 #4 #5 #6 #7 #8 Injector balance at baseline: -0.5, 0.1, -0.2, 0.9, -0.6, -0.1, 0.0, 0.4 Injector balance after additive: -1.0, 0.6, 0.2, 1.0, -0.8, 0.0, -0.1, 0.0 Less fuel being used at idle. Mileage remained about same as baseline Decrease in regeneration intervals: From baseline: longer distance between intervals +78 miles From previous additive (AR6400-D): shorter distance between intervals -102 miles Injector balance seemed relatively the same. My review is based on product efficiency, any damages to vehicle, check engine lights turning on or off, ability to clear engine codes (if my vehicle has any check engine lights), increase or decrease in mileage, and increase or decrease in regeneration mileage intervals. I will not use price as a factor. You will have determine if product is worth the cost. These products may or may not save you costly repairs or replacement. I cannot determine if these products can or will damage your vehicle. My vehicle has no check engine light or error codes. My vehicle is in good working order with no current issues during this review. My vehicle has over 200,000 miles. This is a stock vehicle, with a stock (OEM) factory tune installed. Just prior to this test, my truck was not performing a regen cycle. Repairs were done which included a new 9th injector, new DPF pressure monitor. The pressure monitor measures pressure before and after the DPF filter. The difference in pressure allow computer to estimate how much soot has accumulated in the DPF filter. A force regen was also performed on my vehicle and a passive regen performed before I received my vehicle from repair shop. Vehicle is performing as it should. Test drive is relatively the same and consistent. 49.5 miles one way, with a drive time of about 56 minutes. There is a gradual 1129 foot elevation gain one way and 1129 elevation loss the opposite way. There is some surface street driving, some freeway driving, and most of drive is highway. Hope this review helps. I will be writing more reviews on other diesel additives. I have some data from other additives for comparison listed below. Most products seemed to help and a couple seemed to worsened DPF performance during testing. You should not compare the towing data for comparison. I have just added it to show that towing will change data. Towing will increase exhaust gas temperatures and should make the DPF more effective. My regen mileage intervals increased, decreasing regen frequency, while towing. There are many factors that affect the DPF performance. The factors that I noticed (on my vehicle) are outside temperature, humidity, and EGTs. Lower temperatures decreased DPF performance. Higher humidity decreased DPF performance. Higher outside temperatures and lower humidity seem to increase DPF performance. Higher EGTs such as towing increased DPF performance. Longer driving distance seems helps the DPF filter as optimal temperatures are reached. It seems like soot accumulates faster when the engine and DPF filter are not warm/hot enough, and faster within the first 10-15 miles of travel. If you are only making short trips then the DPF will fill up faster and regens will be more frequent. Regeneration Interval Mileage Comparison of Different Additives: baseline (no additive), 384 miles between regeneration intervals Archoil AR6200 Fuel Treatment, 391 miles between regeneration intervals,+7 mile increase from baseline, +7 mile increase from previous additive(none, baseline) Wynn’s DPF Regenerator, 462miles between regeneration intervals, +78 mile increase from baseline, +71 mile increase from previous additive Seafoam (high dose), 504 miles between regeneration intervals, +120 mile increase from baseline, +42 mile increase from previous additive Nitrox Clean Cat Diesel, 324 miles between regeneration intervals, -60 mile decrease from baseline, -180 mile decrease from previous additive Archoil AR6500 pulling trailer in hot weather (not same comparison) , 1075 miles between regeneration intervals, +691 mile increase from baseline, +751 mile increase from previous additive Nitrox Clean Cat Diesel 2nd try, 402 miles between regeneration intervals, +18 mile increase from baseline, +78 mile increase from previous additive(Nitrox Clean Cat Diesel) Liqui Moly Diesel Purge, 265 miles between regeneration intervals, -119 mile decrease from baseline, -137 mile decrease from previous additive Wynn’s Turbo Cleaner, 298 miles between regeneration intervals, -86 mile decrease from baseline, +33 mile increase from previous additive Rislone Hy-Per Diesel, 323 miles between regeneration intervals, -61 mile decrease from baseline, +25 mile increase from previous additive Rislone DPF Clean, 323 miles between regeneration intervals, -61 mile decrease from baseline, 0 mile difference from previous additive Archoil AR6500 pulling trailer in hot weather one way, cooler temps coming back(2nd trip, different route) (not same comparison), 680 miles between regeneration intervals, +296 mile increase from baseline, +357 mile increase from previous additive Cataclean, 414 miles between regeneration interval, +30 increase from baseline, +26 mile increase from previous additive Archoil AR6500 Diesel Treatment, 564 miles between regeneration interval, +180 mile increase from baseline, +150 mile increase from previous additive Archoil AR6400-D Diesel Fuel System Cleaner, 462 miles between regeneration interval, +78 mile increase from baseline, -102 mile decrease from previous additive Archoil AR6500. Star Review Legend 1 star: Made check engine light turn on or trigger error code(s) 2 star: Causes no check engine warnings and no engine error codes. Mileage worsened or DPF regeneration intervals decreased in mileage. DPF regeneration process worsened. 3 star: gained less than 50 miles in regen mileage interval (from baseline or previous additive), or slight increase in mpg. 4 star: gained more than 50, but less than 100 miles in regen mileage interval (from baseline or previous additive), or +2 mpg increase 5 star: gained more than 100 miles in regen mileage interval (from baseline or previous additive), or +3 mpg increase.

### ⭐⭐⭐⭐⭐ Optimize Performance and Efficiency
*by C***N on July 22, 2023*

Archoil Diesel Fuel System Kit, consisting of the AR6500 Diesel Treatment (40.6 oz) and the AR6400-D Diesel Fuel System Cleaner, proves to be an exceptional combination for optimizing the performance and efficiency of diesel engines. With their advanced formulas and proven effectiveness, this kit deserves a five-star rating. The AR6500 Diesel Treatment is a powerful additive designed to enhance the performance of diesel engines. It improves fuel economy, reduces engine wear, and minimizes emissions. This treatment is formulated with state-of-the-art nanoborate technology, which provides superior lubrication and protects fuel system components from wear and tear. The AR6500 Diesel Treatment also helps to prevent fuel oxidation, corrosion, and the formation of deposits, ensuring a clean and efficient fuel system. The AR6400-D Diesel Fuel System Cleaner complements the AR6500 Diesel Treatment by thoroughly cleaning the fuel system. It removes carbon deposits, varnish, and other contaminants that can accumulate over time and negatively impact engine performance. By using the AR6400-D Diesel Fuel System Cleaner, you can restore power, improve fuel efficiency, and reduce harmful emissions. This cleaner is compatible with all diesel engines, including high-pressure common rail (HPCR) systems. Both products in the Archoil Diesel Fuel System Kit are easy to use. The AR6500 Diesel Treatment can be added directly to the fuel tank during refueling, and the AR6400-D Diesel Fuel System Cleaner is added to the fuel system before an oil change. Following the provided instructions ensures proper application and maximum benefits. One of the standout features of this fuel system kit is its proven track record. Archoil is a trusted brand known for its high-quality products, and the Diesel Fuel System Kit is no exception. Many users have reported noticeable improvements in engine performance, fuel efficiency, and overall drivability after using this kit. It is particularly effective in resolving common issues such as rough idle, sluggish acceleration, and excessive smoke. Another notable advantage of the Archoil Diesel Fuel System Kit is its long-lasting effects. The AR6500 Diesel Treatment provides ongoing protection and lubrication, ensuring sustained performance benefits. The AR6400-D Diesel Fuel System Cleaner's effects can last for thousands of miles, making it a cost-effective solution for maintaining a clean and efficient fuel system. Furthermore, this kit is safe for use in all diesel engines and has no adverse effects on engine components or emissions systems. It is compatible with all diesel fuels, including ultra-low sulfur diesel (ULSD) and biodiesel blends. In summary, the Archoil Diesel Fuel System Kit, consisting of the AR6500 Diesel Treatment and the AR6400-D Diesel Fuel System Cleaner, is a highly effective and reliable solution for optimizing the performance and efficiency of diesel engines. With their advanced formulas, proven effectiveness, ease of use, and long-lasting benefits, this kit deserves a five-star rating. Overall rating: ⭐⭐⭐⭐⭐

### ⭐⭐⭐⭐⭐ Great product for diesel engines!
*by L***P on December 29, 2025*

Helped with cleaning up my engine's performance - much more responsive and improved mileage was a bonus.

## Frequently Bought Together

- Archoil Diesel Fuel System Kit - AR6500 Diesel Treatment (40 oz) + AR6400-D Diesel Fuel System Cleaner
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- Rislone 4780 Diesel DEF Treatment | Prevents AdBlue/DEF Fluid Crystallization, 8 oz

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