❄️ The ONLY treatments your diesel needs in cold weather

The Winter Diesel Kit includes AR6400-D Diesel Fuel System Cleaner and AR6300 Winter Diesel Treatment. Use AR6400-D to rapidly remove heavy build-up from injectors, turbo and the DPF. Follow-up with AR6300 at every fill-up to deliver a complete clean and boost package to the entire fuel system for maximum protection and performance.

Most cold weather diesel additives only offer anti-gel protection. AR6300 Winter Diesel Treatment increases lubricity, boosts performance, restores fuel economy and cleans the fuel system (including the turbo and DPF) to ensure your diesel powers through the winter. Your vehicle gets all the benefits of AR6500 Diesel Treatment PLUS anti-gel protection at every fill-up.

Don't need cold weather protection? Maximize power, performance and MPG with the Diesel Fuel System Kit.

Anti-gel protection

When temperatures reach freezing point (32°F), the wax in diesel fuel begins to crystallize and collect on the fuel filter. This is known as gelling and prevents fuel from getting to where it needs to be, leading to:

  • Trouble starting the engine
  • Poor acceleration
  • Sluggish and noisy performance

The anti-gel properties of AR6300 can prevent diesel fuel gelling down to -44ºF (using the Power Boost treat rate). Preventing gelling ensures your fuel system keeps working correctly through the colder months.

Clean the entire fuel system

Unlike other diesel treatments, which may provide a cetane boost, injector cleaning or enhanced lubricity, Archoil's Diesel Fuel System Kit does all three PLUS removes carbon build-up from the post-combustion system.

AR6400-D's highly-concentrated, one-tank formula rapidly removes heavy build-up from the entire fuel system while AR6300 contains no fillers and utilizes Archoil's proprietary fluid technology to remove performance-robbing carbon from injectors, the turbo, DPF and EGR. The Winter Diesel Kit delivers a complete clean and boost package to protect your engine and maximize performance.

Winter Diesel Kit

Winter Diesel Kit

Regular price $69.90 Sale price$59.90 Save $10.00
  • Free U.S. shipping on orders over $40
  • In stock, ready to ship
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The Winter Diesel Kit includes:

✅ AR6400-D Diesel Fuel System Cleaner

  • Rapidly clean injector tips and IDIDs
  • Remove carbon and restore turbo function
  • Eliminate DPF build-up and reduce regens
  • Restore power and performance

Learn more about AR6400-D

✅ AR6300 Winter Diesel Treatment

  • Anti-gel - prevent diesel fuel from gelling and plugging the fuel filter
  • Boost cetane up to 8 points
  • Increase fuel economy (MPG)
  • Lubricate and protect the fuel system
  • Maintain injectors, turbo and DPF (reduce regens)
  • Extend component life

Learn more about AR6300

Use AR6400-D at the first fill-up then use AR6300 at following fill-ups.

AR6400-D Diesel Fuel System Cleaner

One 12 oz bottle of AR6400-D treats 40 gallons of diesel fuel. Use every 5,000 miles or as required.

AR6300 Winter Diesel Treatment

Standard: 1.5 oz of AR6300 per 10 gallons of diesel (reduces CFPP to -16ºF)

Power Boost: 3 oz per 10 gallons of diesel (reduces CFPP to -44ºF)

Customer Reviews

Based on 104 reviews

Good stuff, smooths it out, better starting

Rex H. (North Platte, NE, US)
Anti jell

Really like this product. Received very fast. Good customer service experience

Rick (Albany, NY, US)
You need this !

This is the only product you should use for winter diesel fuel !
Works fantastic and adds lubrication to your fuel pump and absorbs water !

John S. (Denver, CO, US)
A must

Winter driving this is a must. Keeps diesel system clean and flowing.


AR6400-D rapidly removes internal diesel injector deposits (IDIDs) and carbon build-up from injector tips. Benefits of clean injectors include:

  • Improved fuel atomization
  • Enhanced fuel efficiency
  • Extended engine life


Cleaning injectors results in correct injector spray patterns which ensures that fuel is finely atomized into tiny droplets.

This promotes a more complete and even combustion, leading to higher power output, smoother operation and reduced emissions.


AR6400-D removes soot and heavy carbon deposits from the DPF which reduces regen frequency, restores lost performance and prevents engine damage from a clogged DPF. Reduced DPF regens lead to:

  • Improved fuel efficiency
  • Improved power and responsiveness
  • Reduced maintenance costs

In testing, AR6400-D increased miles between regens 46%


AR6500 improves the lubricity of diesel fuel which is particularly important in cold weather as winter fuel contains less lubricity and diesel engines are put through more wear and tear when temperatures drop. Poor lubricity in fuel leads to:

  • Excessive wear
  • Premature failure
  • Costly repairs

In ASTM wear scar testing, the lubricity of fuel increased by 43%. Improving lubricity extends component life and prevents premature failure.


AR6300 helps prevent gelling in cold temperatures, ensuring optimal engine performance by maintaining fuel flow and preventing filter clogs, ultimately enhancing vehicle reliability and efficiency in winter conditions.

Use of AR6300 can prevent gelling in extreme temperatures down to -44ºF (Power Boost treat rate).


Carbon deposits in the diesel particulate filter (DPF) create a backpressure, causing performance to suffer as exhaust flow is restricted.

AR6500 keeps the DPF free from heavy carbon deposits to:

  • Reduce regen frequency
  • Restore performance
  • Avoid engine damage by preventing a clogged DPF

"Seeing this F-350 run as smooth as it did the day it left the dealership definitely made believers out of us."

"Archoil is the Real Deal"
Diesel Power Magazine

"We are seeing great results using Archoil."

"I highly recommend Archoil products"
George Swift, Mechanic, Jay Leno's Garage

"Improved fuel economy, smoother running engine and no issues with cold starts."

"We're now believers in Archoil"
Diesel Tech Magazine
Winter Diesel Kit

Winter Diesel Kit

Regular price $69.90 Sale price$59.90 Save $10.00
  • Free U.S. shipping on orders over $40
  • 100% Money Back Guarantee
  • In stock, ready to ship
  • Inventory on the way