Name: Winter Diesel Kit
Brand: Archoil
SKU: AR-WDFSK
Price: 64.9 USD
Availability: InStock

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This kit restores lost power and MPG, then gives your diesel everything it needs to run at its best all winter, with added anti-gel protection for the cold.

AR6400-D Diesel Fuel System Cleaner delivers an intensive one-tank deep clean that removes the soot build-up that causes poor fuel economy, power loss, and frequent DPF regenerations.

Follow up with AR6300 Winter Diesel Treatment at every fill-up to improve fuel economy, boost cetane, and protect the entire fuel system while keeping injectors, turbo, and the DPF clean. AR6300 also prevents diesel fuel from gelling in cold weather ❄️

Together they deliver:

Restored power and fuel economy
Smoother, quieter engine operation
Fewer DPF regenerations
Increased lubricity to protect the fuel system (including the CP4)
Anti-gel protection in cold weather

Free AR6400-D on all orders over $120

Free shipping on US orders over $40

AR6400-D Diesel Fuel System Cleaner

One 12 oz bottle of AR6400-D treats 40 gallons of diesel fuel.

Add directly to the fuel tank before filling up.

Use every 5,000 miles, then follow up with AR6300 at every winter fill-up for continuous cleaning, protection and optimal performance.

When running AR6400-D in winter, we recommend also adding a single dose of AR6300 in that tank for the anti-gel protection.

AR6300 Winter Diesel Treatment

One 41.3 oz bottle of AR6300 treats up to 275 gallons of diesel at the standard dose.

Standard: 1.5 oz of AR6300 per 10 gallons of diesel (use above 0°F).

Power Boost: 3 oz of AR6300 per 10 gallons of diesel (use below 0ºF).

Add to the fuel tank before every fill-up. If AR6400-D is going in the same tank, wait until the next fill-up unless it is freezing.

AR6400-D and AR6300 are suitable for use in all diesel vehicles, including newer systems such as High Pressure Common Rail.

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Professional products for diesel owners

Jay Leno’s Garage
“We are seeing great results. I highly recommend Archoil products.”
George Swift, Head Mechanic
★★★★★
“I use this when winter comes since the truck is in an unheated garage and I live in the northeast. Same great stuff but keeps the diesel from gelling.”
Gary B.AR6300 customer, Hudson, NH
Diesel Power Magazine
“Archoil is the real deal.”

★★★★★ 15,000+ ratings on Amazon

Professional products for all diesel owners

Jay Leno’s Garage
“We are seeing great results. I highly recommend Archoil products.”
George Swift, Head Mechanic
★★★★★
“Great product. I use it in my 3.0 diesel. My truck is parked for days when I go snowmobiling. I don’t have the luxury of plugging the heater in, and I have peace of mind knowing my fuel won’t gel at even -30°F.”
John E.AR6300 customer, Westfield, NJ

★★★★★ 15,000+ ratings on Amazon

4 problems with diesel in winter

As temperatures fall, diesel engines become harder to start, idle less smoothly and use more fuel, and a sharp cold snap can stop the truck altogether.

Cold starts get harder

Most U.S. diesel sits around 42 to 45 cetane, when modern engines run best at 47 to 50.

In winter
Colder air and cold cylinder walls draw heat out, and low-cetane fuel can miss the first compression strokes: longer cranking, rough running and smoking.
Fuel pump and injector wear increases

The U.S. lubricity specification allows more wear than the Engine Manufacturers Association recommends.

In winter
Winter blends are usually cut with lighter No. 1 diesel and often carry less biodiesel. Both lubricate less.
Injector deposits show up more

U.S. diesel is not required to contain detergents, so injector deposits that form stay there and disrupt the spray.

In winter
In a cold cylinder, poorly atomized fuel can’t burn fully. The unburned fuel ends up as soot, loading the DPF and fouling the turbo vanes
Winter-blend diesel can still gel

At the pump
Suppliers ‘winterize’ diesel for the temperatures expected where it is sold.

In a cold snap
A cold snap can take it past that temperature. Wax crystals then block the filter and cut off the fuel supply.

Diesel Tech Magazine
“Improved fuel economy, smoother running engine and no issues with cold starts.”

two-step solution

AR6400-DDiesel Fuel System Cleaner

AR6400-D rapidly removes heavy injector deposits, restoring lost power and performance.

Before

After

Injectors

Removes internal diesel injector deposits (IDIDs) and heavy carbon build-up from injector tips.

Before

After

Turbo

Reduces build-up in the turbo.

Before

After

DPF

Reduces soot and heavy carbon deposits in the DPF.

Diesel Power Magazine
“Seeing this F-350 run as smooth as it did the day it left the dealership definitely made believers out of us.”

AR6300Winter Diesel Treatment

Starting from a clean baseline, AR6300 works at every winter fill-up to prevent new deposits forming, lubricate the pump and injectors, prevent diesel gelling, and improve power and MPG.

Improves cold starts

AR6300 raises cetane by up to eight points, helping the engine start more easily and run more smoothly.

In most states, the legal minimum cetane rating at the pump is just 40. Raising cetane shortens ignition delay, so fuel ignites sooner and burns more completely. The result: smoother, quieter running, easier cold starts, and less unburned fuel leaving as smoke and soot.

Adds lubricity

AR6300 adds the lubrication you're missing from the pump to protect the fuel pump and injectors.

In ASTM testing, AR6300 produced a 43% smaller wear scar, far below the 460 µm benchmark, extending component life and reducing maintenance costs.

Untreated test fuel, Wear-scar diameter (µm) — Wear-scar diameter (µm)

Test fuel treated with AR6300, Wear-scar diameter (µm) — Wear-scar diameter (µm)

Keeps injectors clean

AR6300’s detergents keep injectors clean and maintain optimal fuel delivery, and its soot-control chemistry limits deposits in the turbo and DPF, maintaining throttle response and reducing how often the DPF regenerates.

Anti-gel protection

AR6300’s cold-flow improver keeps wax crystals small enough to pass through the filter instead of gelling together. The published cold-filter plugging point is as low as -44°F at the standard dose.

Cold-filter plugging point

-44°FStandard dose

Be prepared.

AR6300 has to be in the tank before the cold arrives: it stops wax forming but cannot clear a filter that has already plugged. Treat the fuel at every fill-up, not after the truck won’t start.

100% Money-Back Guarantee

If your performance doesn’t improve, we’ll refund your purchase - no questions asked.

In the kit

One 12 oz bottle of AR6400-D Diesel Fuel System Cleaner
One 41.3 oz bottle of AR6300 Winter Diesel Treatment

For every diesel

Power Stroke, Cummins, Duramax, European diesel cars and SUVs, and light-duty through Class 8 trucks, including high-pressure common rail systems.

Frequently asked questions

Can I use it in my truck?

Yes. AR6400-D and AR6300 are suitable for use in all diesel vehicles, including newer systems such as High Pressure Common Rail: Power Stroke, Cummins, Duramax, European diesel cars and SUVs, and light-duty through Class 8 trucks.

How much do I add?

AR6400-D: add the 12 oz bottle to the fuel tank before filling up. One bottle treats 40 gallons of diesel fuel.

AR6300: add to the fuel tank before every fill-up. The standard dose is 1.5 oz per 10 gallons. The Power Boost dose is 3 oz per 10 gallons, so a bottle treats half as much fuel at that rate. The 41.3 oz bottle treats up to 275 gallons at the standard dose.

How cold does it protect to?

The published cold-filter plugging point at the standard dose is -44°F.

In temperatures below 0ºF, We recommend running the Power Boost dose (3oz per 10 gallons).

Will it clear fuel that has already gelled?

No. AR6300 stops wax forming but cannot clear a filter that has already plugged, so it has to be in the tank before the cold arrives.

Can I run AR6400-D when it’s already freezing?

We recommend adding a single dose of AR6300 to the same tank as AR6400-D in winter for the anti-gel protection.

How often should I use AR6400-D?

Use it every 5,000 miles, then follow up with AR6300 at every winter fill-up for continuous cleaning, protection, and optimal performance.

Does AR6300 work with biodiesel and emissions equipment?

Yes. AR6300 can be used in pre-emissions, emissions-equipped and deleted engines, and is compatible with ULSD, renewable diesel and biodiesel blends.

Do I still use AR6500?

Use AR6300 instead during winter. It provides the same cetane, lubricity and detergency as AR6500, so you give up no benefit by switching early. Switch back to AR6500 when anti-gel protection is no longer needed.

How is this different from the Diesel Fuel System Kit?

Both kits start with a one-tank deep clean from AR6400-D. The Diesel Fuel System Kit follows it with AR6500 Diesel Treatment. The Winter Diesel Kit follows it with AR6300 Winter Diesel Treatment, which provides the same cetane, lubricity and detergency as AR6500, with added anti-gel protection for the cold.

5 stars: 232 (91%)
4 stars: 12 (5%)
3 stars: 8 (3%)
2 stars: 1 (0%)
1 star: 1 (0%)

This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.

There is a difference

I was skeptical at first, tried some of the other products, but didn’t produce tangible results. My 2022 6.7 dually runs quieter, noticeably! The mpg has gone up 3-4 mpg both towing and highway runs. There are less regens. The big difference is it uses less def. I am totally convinced that there is a difference. AND, when you call for tech support or a question, a real live English speaking person answers the phone! Thats impressive.

Great product even at -30F

Great product. I use it in my 3.0 diesel. My truck is parked for days when I go snowmobiling.. I don't have the luxury of plugging the heater in and I have peace of mind knowing my fuel won't gel at even -30F

Great quality

I can definitely tell the difference when I started using. Engine is running much more smoother.

Not really that cold but could be.

I get the AR6300 not because it’s cold where I live. I get it because I could go where it is cold and don’t want to worry about fuel gelling and hard starts. I’ve used Archoil products from day one when I bought my truck and plan to use it over the life of my truck.

Archoil for 6.7 cummins

Works wonders for regens and fuel boost

Excellent winter juice!!!

Tried my first bottle of AR6300 works amazing compared to many other arrivals on the market and when it warms up in temps I’ll be giving it a dose of the DPF cleaner to blow out the nasty soot that clogs our DPF filters giving my truck the robust beast that it is taking this 2021 GMC Sierra Duramax LM2 back to the showroom condition it deserves!!! Thanks Archoil for Elite products !!!

Great Product

It works great the diesel gauge doesn’t move like it did before less fill up

Cold weather driving

The temps dropped to below zero this weekend and the truck is running great, have seen an improvement in the mileage as well.

Never hurts

Only been using this product for about a month. So far so good. Never really hurts to add a little extra protection. If the united states would produce diesel the way it is supposed too we wouldn't need additives.

Lives up to the hype for sure!!!

I am new to the diesel world. Got myself a 2022 F250 6.7 crew cab long box. It’s like driving a bus without annoying kids screaming all the time, just some of the time when my kids are in there LOL! Needless to say I had to do my research on what was best to keep my fuel system running as good as it can. I live in upstate NY today’s temperature was 8 degrees. I had two concerns that my truck went into regen way too often, and I use my truck for my landscaping/snow removal business, so getting better GPM numbers, especially on load with a trailer or my salter with a ton and a half of salt. It fixed the regen for sure, this is my second bottle of the AR6300. I’d say I went into regen at least 2 or three times a day. I do a lot of little trips so I don’t get to burn the DEF out. It now maybe does it once a day, maybe every other day. I’ve also gained 9% more in the GPM, even with a full dump trailer with skid steer and the salter in the back of the truck full.
I have told so many people about this! I’m so happy when a product works as it says it does. You don’t always see that these days!!! Thank you for this product, I have a bottle of the system cleaner that’s going in tomorrow. I may even change my oil changes to their oil!

F-250...6.7 Power Stroke

Used half a bottle in my fuel tank. Not enough yet for results!! Only drive this pickup 5000 miles a year, sorry no info as of yet!

Archoil fuel treatment

I have been using archoil winter treatment for 40 days. What a great product. I use it in both of my Chevrolet diesel trucks with awesome results. We have been averaging around 20 degrees, performance seems to have increased. Love the product. Thank you

I like it

I could tell a difference within 10 miles of using it the first time
👉🏽Engine sounded smoother
👉🏽Throttle response is quicker
👉🏽Full milage improved to 20+mpg
I’ve been using it for about a year now, and will purchase again
Thank you

Great winter boost

Use this in alaska most of the winter. Awesome product and no issues.

First time user

I have ran HotShots almost every single tank for the past 3 years and 380k miles until this last trip. 5k miles and a bottle of this and i noticed my mileage, pulling a 40ft livestock trailer as i do 99% of the time, went up almost 2 MPG. Think i found a new additive!!

This stuff works!

I’ve been using Archoil for the fuel and the oil for a little over 4 years now, ever since my 6.0 was rebuilt by Powerstroke Specialties in Buford, Ga.
Bill Hewitt recommended it and I completely agree.

Works great

-5 degrees in Wisconsin, forgot to plug truck in, went outside and fired right up. I’d say it does it’s job!

Quality products

Ever since I’ve owned my 7.3 I’ve been using the stiction modifier in every oil change as well as the fuel additive every fill up. Very happy how my truck is running. Currently using the winter fuel additive up here in MN. No gumb up or freezing fuel issues and starts well in the two -15 days we’ve had so far. Will never stop using these products.

The Best Stuff!

I have used Archoil products since I bought my ‘05 F350 6.0L 5 years ago. I had a stiction issue which was resolved by AR6400 & AR9100 (oil additive). When winter came & freezing temperatures I needed an anti-gel product. AR6300 was my only option since I had great results with the other two products. Never had a problem with cold starts. The truck runs great! I highly recommend all Archoil products for diesel vehicle owners.

Really pleased.

Funkiest bottle I've ever seen. But, every Archoil product I have ever used has worked incredibly well. Use anything you make for the Ford 6.0 Powerstroke. If you get around to making a transmission additive, let me know. I'll be the first one to buy it.

Great Product

I love this product helps my truck run great and I use it in all my diesels all the time

Prepping for winter

Use the AR6500 and love it got this to prepare for winter. Excellent products

Great Stuff

I use the standard Archoil AR6500 on my 2024 Chevy 3500 Duramax since new, runs great and getting up to 11 MPG pulling my 5th wheel camper. I use this when winter comes since the truck is in an unheated garage and I live in the northeast. Same great stuff but keeps the diesel from gelling. I will start adding this around November.

Product is great. I used it in my 6.0 and continue to use it in my 6.7. I use the Archoil products in all my vehicles. Only issues I've had is with shipping. Every time my order is lost, damaged, or delayed. Customer service always handles arrordinly but please use someone other than the USPS.

Winter Diesel Kit

Professional products for diesel owners

Professional products for all diesel owners

4 problems with diesel in winter

Cold starts get harder

Fuel pump and injector wear increases

Injector deposits show up more

Winter-blend diesel can still gel

two-step solution

Injectors

Turbo

DPF

Improves cold starts

Adds lubricity

Keeps injectors clean

Anti-gel protection

Be prepared.

100% Money-Back Guarantee

Frequently asked questions

Customer Reviews