Diesel Treat

Diesel Treat 100% guaranteed

Diesel Treat

Diesel Anti-Gel & Fuel Conditioner

Howes Diesel Treat is North America’s number one selling anti-gel and fuel conditioner. Made with no alcohol or harmful solvents, Diesel Treat safely removes water and prevents gelling in even the coldest climates. Safe, effective, and loaded with the latest and greatest performance-enhancing technology, Diesel Treat is designed to solve the problems created by today’s ULSD fuel. It provides lubricity, prevents deposits, and eliminates smoking and rough idle. Warranty safe, it is effective in all diesel and biodiesel fuels, including home heating oil. From truckers to farmers, pick-ups to diesel automobiles, Howes Diesel Treat is the most trusted additive on the market. Best of all, Diesel Treat is guaranteed to work. At Howes we guarantee, “YOU GO or WE PAY the TOW!”

Available sizes:

15 oz 32 oz 64 oz

WARNING: Cancer - www.P65Warnings.ca.gov



Prevents Fuel From Gelling

Howes Diesel Treat is the nation’s most trusted anti-gel. Its special formula has been tested and proven time and again to prevent gelling in even the coldest weather. Owners of all types of diesel vehicles and equipment rely on the Howes family’s guaranteed product to keep them going all winter long.


Adds Lubricity

Diesel Treat helps protect against today’s Ultra Low Sulfur Diesel (ULSD) fuels by providing added lubricity to injectors, pumps, and upper cylinders. In doing so, it extends the life and increases the performance of diesel engines of all types.


Prevents Deposits

More than just an anti-gel, Diesel Treat also contains a specialized detergent package to help prevent fuel injector deposits. Carbon deposits on diesel injector systems can cause loss of engine power and other issues. Preventing these helps to improve performance and fuel economy, saving you money.


Removes Water

Water is abrasive to your system and can lead to fuel filter icing. Many products emulsify or mix water into the fuel, often using harmful alcohols or solvents that can do additional damage to your engine. Petroleum-based Diesel Treat demulsifies water, safely pushing it out of the fuel using no alcohol or harmful solvents.

Other Features Include

  • Prevents diesel fuel from gelling
  • Increases lubricity in injectors, pumps, and upper cylinders
  • Prevents injector deposits
  • Safely removes water
  • Eliminates smoking and rough idle
  • Reduces cold filter plugging
  • Increases power and fuel economy
  • Safe and effective in all diesel and biodiesel blends
  • Particulate filter friendly and warranty safe for all diesel emission systems
  • Contains no alcohol or harmful solvents
  • Why Use Howes Diesel Treat?

    Many vehicles and equipment from pick-up trucks to 18 wheelers, boats to tractors, and everything in between, are made with diesel engines. These engines are powerful, and often last longer than those of gasoline engines. There are many benefits to a diesel engine on the road and on the farm, but diesel can have its downsides.  Today’s Ultra Low Sulfur Diesel (ULSD) fuel is severely lacking in lubricity. The tight clearances and extreme heat of newer High Pressure Common Rail (HPCR) systems make them prone to diesel injector deposits. Furthermore, diesel fuel, especially biodiesel, has a high likelihood of gelling when exposed to freezing temperatures. If you’re new to using diesel fuel, you may be concerned when you hear the term “gelling” — or worse, experience it for yourself! Gelling is the result of diesel fuel thickening up in freezing temperatures and can block filters, lines, and fuel rails.  At around 34°F, you can start to see the process of gelling; fuel in the tank starts to thicken, form deposits, and get cloudy. By around 15°F or lower, untreated diesel fuel may fully gel, resulting in smoke, hard starts, the loss of power, or the inability to start at all. When a diesel engine doesn’t run, unwanted downtime and potential lost revenue are likely to follow.  Luckily Howes Diesel Treat is your unbeatable solution. Both an anti-gel and fuel conditioner, Diesel Treat provides you with all the added benefits your diesel needs while preventing gelling in even the coldest temperatures. Petroleum-based and made with no alcohol or harmful solvents, Diesel Treat is always safe to use and will not void any manufacturers’ warranties. Best of all, Diesel Treat is 100% guaranteed. Howes is the only company to offer a free tow guarantee. “YOU GO or WE PAY the TOW!”


Truck HD Trucks

Tractor Tractors

Construction Construction



Part # Size *Above 0° F *Below 0° F
103064 15 oz. 1 oz. to 5 gal. 1 oz. to 2.5 gal.
103062 1 quart 1 oz. to 5 gal. 1 oz. to 2.5 gal.
103060 1/2 gal. 1/2 gal. to 320 gal. 1/2 gal. to 160 gal.
103068 55 gal. drum 1 gal. to 640 gal. 1 gal. to 320 gal.
103089 275 gal. tote 1 gal. to 640 gal. 1 gal. to 320 gal.

* Cars/Pickups/Tractors double dose both treatment ratios


Diesel engines can be a bit hard to understand for those who have only used gasoline engines for the majority of their lives or careers. But there are major benefits to diesel engines, especially when you care for them correctly. Using an additive to prevent diesel fuel from gelling, as well as for lubrication and cleaning, will extend the life of your engine. Using these types of products can be the key to a long, successful trucking or agricultural career. They can help you to protect and power your diesel trucks, cars, boats, or large equipment year after year. When using a product like Diesel Treat, it’s important to understand exactly what it does and the types of problems it’s intended to fix. Read the following FAQs to understand more about fuel additives, gelling, and how to protect your fuel system.


  • What Is Diesel Gelling?

    Diesel gelling is what happens when cold weather or freezing temperatures cause diesel fuel to form wax crystals and begin to turn from a liquid into a gel-like substance, preventing it from pouring. The lowest temperature at which diesel fuel can be poured is called the pour point. After reaching its pour point, diesel fuel will be too gelled to flow through your system. Though gelling temperatures vary based on the quality of the fuel and other factors, it’s good to assume that if the weather reaches the point of freezing (around 32 degrees Fahrenheit), your untreated diesel is on its way to gelling.
    Gelled diesel will not flow properly though your engine, so you need to fix this problem as fast as possible if you start to see cloudiness in your diesel fuel or pouring becomes difficult. But the best way to deal with gelling is to prevent it in the first place. Anti-gel products, such as Diesel Treat, can be added to your diesel in order to keep it in its liquid form even in freezing temperatures.

  • How does Diesel Treat safely remove harmful water from diesel fuel?

    Diesel Treat safely removes water from your system by demulsifying it or pushing water molecules out of the fuel to be removed by your water separator, allowing only pure fuel to burn. Water can be very abrasive to your system, cause corrosion, and erode injector nozzles. It can also lead to icing, which causes problems similar to gelling. Other products emulsify water or mix water molecules into the fuel, allowing it to flow through your system where it can cause damage. Demulsification is the preferred method to remove water molecules from diesel fuel according to major diesel engine manufacturers. Diesel Treat is 100% petroleum-based and made with no alcohol or harmful solvents. Products that use alcohol may be very corrosive to your system. Alcohol can cause the swelling and breakdown of gasket and seal materials. Alcohol is also good “food” for bacteria and other microorganisms so it can contribute to the development of algae and microbial growth. Diesel Treat is always safe to use and will not void manufacturers’ warranties. 

  • Is Using a Fuel Additive Safe Long-Term?

    Yes! In fact, it’s recommended that you use a diesel fuel additive to extend the life of your diesel engine. Whether you drive a large truck, work with an excavator at a construction site, or navigate an RV across the country on your vacation days, you can certainly benefit from adding an additive all year round. Fuel additives that clean and lubricate diesel fuel will prevent premature wear of your injectors, pumps, and upper cylinders. In colder climates, or in situations where you might travel from warm weather into colder temperatures, an additive like Diesel Treat that includes an anti-gel is important. A system that does not use quality additives may suffer over the years, not lasting nearly as long as an engine that was properly cared for. Not using an anti-gel in the winter could cause serious down time and cost you money. Howes products can be used simultaneously and overtreatment is not harmful. Even if you’re using an injector cleaner like Howes Diesel Defender, if cold weather starts to sneak in, you can add Diesel Treat right away without any issues.


Find Howes Diesel Treat at numerous locations nationwide.

Have questions or comments about this or other Howes premium-quality products? We want to hear from you! Contact us today for more information.





See what Diesel Treat can do for your diesel engine.

Testimonial Truck Noshadow

“My Truck Has Never Frozen Up…”

I use your product year round. It works great! I began using it in the winter of 1991 and am pleased with the result. My truck has never frozen up. Last year, a truly brutal winter, I passed many trucks that had fuel problems, feeling very fortunate to be moving. Since I am still relatively new to trucking, it was satisfying to know that I chose a winner in Howes Anti-Gel.

- Ben B. Chesapeake, VA

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