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AR6400-G Gasoline Fuel System Cleaner

Essential Maintenance for Your Fuel System

Archoil's high concentrate AR6400-G Gasoline Fuel System Cleaner is designed to restore and maintain maximum performance and fuel economy.

Even a brand new vehicle's performance will decline if not regularly treated with a fuel system and engine cleaner.


For Gasoline Engines

AR6400-G is formulated to clean gasoline engines and fuel systems. Use AR6400-G every 5,000 miles to maintain a clean fuel system and engine.


  • Optimized for gasoline engines
  • Cleans fuel system and injectors
  • Reduces combustion chamber deposits
  • Cleans intake valves
  • Increases power and fuel efficiency

How it Works

Clean fuel system and engine

AR6400-G uses PEA detergents to quickly and safely remove gum, varnish and carbon from the fuel system and engine. AR6400-G will also clean carbon deposits from intake valves on manifold injected vehicles, and help to remove deposits from turbochargers and EGR valves.

Ensure optimum power and fuel efficiency

Many of the world's automobile manufacturers including BMW, GM, Fiat Chrysler Automobiles, Honda, Toyota, Volkswagen, Mercedes-Benz and Audi, recognize that the levels of detergents required by the EPA to be present in gasoline is not high enough to maintain optimal engine performance. Removing deposits which have built up over time will restore power and fuel economy which has been degraded by deposit formation. Regular use of AR6400-G will help maintain optimum fuel economy and power.

AR6400-G Usage

Use AR6400-G every 5,000 miles or as required. We recommend using AR6200 Fuel Treatment at every fill-up between AR6400-G treatments.

One bottle of AR6400-G treats between 12 and 25 gallons of fuel. Use one bottle per 12 gallons of fuel for deep cleaning.

AR6400 Frequently Asked Questions

What's the difference between AR6200 and AR6400-G?

A small amount of AR6200 Fuel Modification Complex is added to every tank of fuel to boost performance, ensure fuel quality and protect the fuel system from wear, deposit formation and corrosion. AR6400-G is designed to be added in large doses to remove existing deposits from your fuel system and engine. For example, a 16.9 oz bottle of AR6200 treats up to 500 gallons of fuel and a 16 oz bottle of AR6400-G treats up to 25 gallons of fuel.

I am currently using AR6200 in every tank of fuel and my vehicle is running fine. Will there be any benefit to using AR6400-G?

Removing deposits which have built up over time from diesel or gasoline engines will restore power and fuel economy which has been degraded by deposit formation. Using a fuel system and engine cleaner regularly will maintain optimum fuel economy and power. AR6200 Fuel Modification Complex is a maintenance product and will help keep your fuel system clean in between treatments, but in order to remove heavy deposits the higher concentration of detergent offered by AR6400-G Fuel System and Engine Cleaner is necessary.

Can I use AR6200 at the same time as AR6400-G?

You can use AR6200 at the same time as AR6400-G

Customer Reviews

Based on 17 reviews
william l. (Atlanta, GA, US)
Does what it says it will do and more

I have used some of the Top Cleaners on the market not to mention big which I thought was the very best and this ranks right up there I will be using this going forward whenever I need to clean my fuel system I use all your products and they are all excellent

Moderjes D.


Elwood W. (Franklin, TN, US)
No more spark knock

My 2005 Silverado had spark knock from almost the day I brought it home. I only drive 12 miles daily back and forth to work. After using the AR6400-G for less than a month, NO more spark knock. Quality products that deliver results. Thanks Archoil.

Carol B. (Los Angeles, CA, US)
Won't drive without Archoil

I have a 23yr old Toyota RAV4. I have had 2 other older Toyota's as well. They all seemed to drive
"rough", as if the engine was grinding .and needed lubrication though the oil and water were fine. They all have developed
EGR valve problems. I had the engine light go on, coded to EGR
Valve. I had some Catyclean because I had just replaced catalytic converter 4 mo. before,
and because it said that it could also clean up EGR deposits I put that in while I waited for my Archoil order. I then used the
AR6400 and started regularly using the AR6200 fuel treatment.
The check engine light went off.
I get noticebly better gas mileage and the car runs smooth, like new, and has more power, especially on acceleration.
I am a convert- I will NEVER fill up a tank without AR6200, and will use the AR6400 at regular intervals to keep my engine running clean. Worth every penny!

Thomas B. (Jacksonville, FL, US)
Works great

Car starts quicker now and the slight hesitation i had before the trans would kick down is gone. Not sure if it was necessary, but i used this when i filled up with ethanol free gas from Shell. I used a tank of ethanol free gas prior to adding this and filling to make sure i got out as much ethanol from my tank as possible. Will definitely keep using this product and other Archoil products. I just wish it was available over the counter but i don't mind ordering something if it works like this does.