Best Howes in 2026

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.

Adds Up To 2.5x More Lubricity - With more lubricity than any other Howes product and many on the market, Diesel Defender is the ultimate choice for heavy duty vehicles. It provides protection by significantly reducing wear scars, with independent lab* results confirming Defender treated fuel outperformed the US (520mm) and more stringent European (460mm) standards. *via the wear scar test for ASTM D975 High Frequency Reciprocating Rig (HFRR)

Cleans Fuel Injectors - Uses superior IDX4 Detergent to attack and destroy even the toughest carbon deposits. When used as directed, Diesel Defender is designed to clean the entire fuel system within three treatments and prevent future deposits from forming. The removal of these deposits keeps the diesel fuel system performing optimally and increases power.

Increased Fuel Economy Guaranteed - By safely removing water, Diesel Defender leaves only pure fuel to burn. Your clean injectors then allow for a steady spray pattern, so none of that fuel is wasted. When used regularly, Diesel Defender guarantees a minimum 5% increase in fuel economy.

STORAGE – STA-BIL Storage Fuel Stabilizer eliminates the need to drain fuel and keeps gasoline fresh for up to 24 months. Never fear your car or small engine refusing to start due to fouled fuel. This product is effective in all gasoline and ethanol blended fuels including E-10 through E-85

ENSURES QUICK, EASY STARTS – Treating your gas with this fuel stabilizer prevents gum, varnish, rust, and corrosion in your fuel tank, all of which are costly to repair. The 16 oz. bottle of this alcohol-free fuel additive treats up to 40 gallons of fuel, and it is perfect to use prior to storing either your vehicle or outdoor power equipment for an extended period

VERSATILE – STA-BIL Storage Fuel Stabilizer is safe for use in all gasoline engines, including 2-cycle. Use this fuel treatment in your vehicle, motorcycle, lawn mower, snow blower, boat, and generator

Keeps fuel fresh for up to 24 months during storage

Eliminates the need to drain fuel prior to storage

Ensures quick, easy starts after storage

Keeps fuel fresh for up to 24 months during storage

Eliminates the need to drain fuel prior to storage

Ensures quick, easy starts after storage

Keeps fuel fresh for up to 24 months during storage

Eliminates the need to drain fuel prior to storage

Ensures quick, easy starts after storage

IMPROVES TOWING POWER: Helps breakdown and remove performance robbing deposits from the entire fuel system

IMPROVES ACCELERATION: Helps boost catane up to 7 points - improving efficency and throttle response

CLEANS AND LUBRICATES: Treats turbos, fuel injectors, pistons, and combustion chamber components

Keeps fuel fresh for up to 24 months during storage

Eliminates need to drain fuel prior to storage

Ensures quick, easy starts after storage

Keeps fuel fresh for up to 12 months during storage

Eliminates the need to drain fuel prior to storage

Ensures quick, easy starts after storage

Cleans and Lubricates Fuel System: The product contains a blend of detergents and additives that help to clean and lubricate the fuel system, including the fuel injectors, carburetor, and combustion chamber.

Improves Fuel Economy: The product can help to improve fuel economy by removing deposits and contaminants from the fuel system and improving the efficiency of fuel combustion.

Reduces Emissions: By improving fuel combustion, the product can also help to reduce exhaust emissions, including harmful pollutants such as carbon monoxide and nitrogen oxides.

Cleans and Lubricates Fuel System: The product contains a blend of detergents and additives that help to clean and lubricate the fuel system, including the fuel injectors, carburetor, and combustion chamber.

Improves Fuel Economy: The product can help to improve fuel economy by removing deposits and contaminants from the fuel system and improving the efficiency of fuel combustion.

Reduces Emissions: By improving fuel combustion, the product can also help to reduce exhaust emissions, including harmful pollutants such as carbon monoxide and nitrogen oxides.

QUALITY ASSURED

Reduces: rough idle, engine surge, hesitation, and spark plus fouling

20 oz. bottle.

Restore power and performance - Restores lost power and performance by removing gum, varnish, and other fuel system deposits.

Maximize fuel economy - Keeps engines clean, and protects from deposits that rob engine efficiency and reduce fuel economy.

Protect the fuel system and fuel gauge sensor from various types of corrosion - Multiple corrosion inhibitors protect metal components (both ferrous components like iron and steel, and non-ferrous components like copper and silver) from the damaging effects of corrosion.

Helps clean build-up of deposits through the entire fuel system

Helps clean pre-existing internal diesel injector deposits (idroid)

Helps restore cetane boost, improving combustion for reduced emissions and improved cold starting

Auto & Truck Maintenance

Country of manufacture: United States

Manufacturer: STA-BIL

MADE FOR OPTIMAL LUBRICATION: Your truck has been there for you every minute and every mile, which is why it’s important to keep it in pristine condition. At Opti-Lube, our goal is to keep your engine operating at its best. Our fuel additive helps to increase the lubricity properties of ultra-low-sulfur diesel (ULSD) so that you can play more and worry less.

IMPROVES FUEL ECONOMY: Trucks are known for eating up fuel. Fortunately, there’s a way to fix that with Opti-Lube XL Xtreme Lubricant formula. This diesel fuel additive has been shown to enhance fuel mileage, giving you more bang for your buck. With greater fuel economy, you’ll find increased power for summer driving.

CLEANS INJECTORS: When your fuel injectors build up with residue, your engine doesn’t run as efficiently. Opti-Lube XL Xtreme Lubricant formula cleans injectors and helps prevent future build-up. This helps to reduce deposits and emissions, making this lube compatible with all vehicle emissions systems. Additionally, it acts as rust and corrosion prevention to keep your vehicle in tip-top shape.

New

Item Package Dimension: 11.749999988015L x 3.249999996685W x 3.249999996685H inches

Item Package Weight - 1.99959271634 Pounds

Item Package Quantity - 1

Prevent sludge and sediment formation

Clean & lubricate entire fuel system

Protect against corrosion

America’s #1 Ethanol Treatment

Helps prevent Ethanol fuel related damage in vehicles and small engines

Advanced formula for engines used in water environments, to better remove the moisture

Prevent sludge and sediment formation

Clean & lubricate entire fuel system

Protect against corrosion

America’s #1 Ethanol Treatment

Helps prevent Ethanol fuel related damage in vehicles and small engines

Advanced formula for engines used in water environments, to better remove the moisture

Prevents Ethanol fuel related damage in boats and other marine engines

Specially formulated for use in high-moisture environments

Removes water from fuel to help prevent phase separation

Keeps fuel fresh for up to 24 months during storage

Eliminates the need to drain fuel prior to storage

Ensures quick, easy starts after storage

America's #1 ethanol treatment - helps prevent ethanol fuel related adage in marine engines

Prevents corrosion caused by ethanol blended fuels

Increases engine power and efficiency

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.

Hot Shot's Secret anti-gel diesel additive provides winter protection against freeze-ups, dramatically improves cold-temperature performance and contains a powerful cetane booster for a maximum improvement in performance, power and cold start speed.

This effective anti-gel additive significantly enhances cold-temperature performance and helps prevent the wax in fuel from clogging lines.

Hot Shot's Secret Diesel Winter Anti-Gel is recommended for use in all diesel engines. The anti-gel formula provides lubricity, stability, winter operability, detergency and increased cetane number to standard diesel fuels.

Safe to use in all diesel engines including agricultural and marine

Safe to use in all diesel fuel, including ultra low sulfur diesel and bio-diesel

Keeps diesel fuel fresh, for quick easy starts