The Best Additives 2025

1. POWER SERVICE PRODUCTS 1025 Diesel Fuel Supplement,Amber,32 oz. G5573246

Diesel Fuel Supplement,Amber,32 oz. Features Application: Prevents Diesel Fuel Gelling Color: Amber Container Type: Bottle For Use With: Automotive Item: Diesel Fuel Supplement Package Quantity: 1 Size: 32 oz. Type: Fuel Additive Size/Net Weight: 1.8 lb. Appearance: Liquid Sub-Category: Fuel Additives and Stabilizers

Item Type: Diesel Fuel Supplement Brand: POWER SERVICE PRODUCTS Manufacturer Part Number: 1025

2. Power Service 03016-09 Diesel Fuel Additive, Amber, 16 Oz., G5573219

POWER SRVC DSL KLEEN FL INJCT CLNR BTL

Item Type: Diesel Fuel Additive Brand: POWER SERVICE PRODUCTS Manufacturer Part Number: 03016-09

3. Super Tech 42348 Engine Starting Fluid -11oz Can (1 count)

Super Tech Engine Starting Fluid helps start gasoline and diesel engines at most temperatures. Regular use helps give fast starts, extends battery life and saves wear on starters. Recommended year-round for starting automobiles, trucks, tractors, lawn mowers, chain saws, marine engines, motorcycles and other equipment powered by internal combustion engines. Product is 8.0 x 2.69 x 2.69 inches, with a 11oz fill, 1 count.

For gasoline or diesel engines Starts engines quickly and reduces drain on batteries Contains an upper cylinder lubricant Gives smooth starts in all kinds of weather Low freezing point, high vapor pressure, and a low flash point 8.0 x 2.69 x 2.69 inches 11 oz fill size 1 count

4. Iso-HEET Water Remover & Premium Fuel Line Antifreeze + Injector Cleaner 12 oz. Each, Safe for Gas and Diesel Engines (Pack of 4) (28206)

Gold Eagle Iso-HEET Water Remover and Premium Fuel Line Antifreeze + Injector Cleaner is a high-quality gas-line antifreeze that goes above and beyond regular gas dryers by absorbing up to 5 times the amount of water. It is specifically formulated for use in all 2 and 4 cycle gas and diesel vehicles, making it a versatile and reliable option for vehicle owners. ISO-HEET is not only effective at removing water from fuel, but it also serves as a preventative measure against rust and corrosion, ultimately prolonging the life of the vehicle's fuel system. This makes it an essential product for year-round use, especially in below freezing temperatures where water absorption is crucial for optimal vehicle performance. The convenient 12 ounce bottle with an easy pour design ensures that using ISO-HEET is a hassle-free experience, allowing for quick and efficient application with every fill-up. Whether it's for regular maintenance or addressing specific fuel-related issues, Gold Eagle Iso-HEET Water Remover and Premium Fuel Line Antifreeze + Injector Cleaner is a reliable and effective solution for vehicle owners looking to maintain the integrity of their fuel system.

#1 Selling Brand Of Premium Gas-Line Antifreeze Absorbs 5 Times More Water Than Regular Gas-Line Antifreeze Cleans Fuel Injectors and Carburetors Designed For Year Round Use In All 2-Cycle and 4-Cycle Gas and Diesel Engines Removes Water From Fuel System - Prevents Rust and Corrosion Size: four 12 ounce Bottles

5. STA-BIL Storage Fuel Stabilizer for Gasoline Engines, 4 Fluid Ounces (22205) Treats 10 Gallons.

STA-BIL Storage Fuel Stabilizer is a 4-ounce bottle that treats up to 10 gallons of fuel , keeping it fresh for up to 24 months. It eliminates the need to drain fuel prior to storage and prevents corrosion, gum, and varnish in 2 and 4 cycle gasoline engines. The product is safe for use in all ethanol and non-ethanol blended fuels and removes water to prevent corrosion , cleaning carburetors and fuel injectors. It prolongs engine life and ensures quick, easy starts after storage. This fuel stabilizer is a must-have for anyone storing fuel for extended periods.

America’s #1 Fuel Stabilizer Treatment Keeps Fuel Fresh For Long Term Storage – Up To 24 Months Eliminates The Need To Drain Fuel Prior To Storage Ensures Quick, Easy Starts After Storage By Preventing Gum and Varnish Build Up Effective In All Gasoline, Including Ethanol and Non-Ethanol For Use In All Gasoline Engines, Including 2-Cycle - Use In Your Vehicles, Motorcycles, Small Engines, Boats, and Generators

6. POWER SERVICE PRODUCTS 1080-06 Diesel Fuel Supplement,Amber,80 oz. G5573237

You can avoid delays and experience faster cold starts with this Power Service 1080-06 Diesel Fuel Supplement. Formulated with Cetane Boost, the ultra-low sulfur diesel (ULSD) anti-gel formula prevents fuel from gelling, keeps injectors clean and boosts cetane. The Power Service diesel fuel supplement works in all diesel fuels, including ULSD and biodiesel blends containing up to 20 percent biodiesel. It also contains Slickdiesel for improved fuel lubrication and protection from low and ultra-low sulfur diesel. The Power Service 1080-06 Diesel Fuel Supplement comes in a convenient 80 fl oz container. It provides enough formula to treat up to 250 gallons.

Power Service Products 1080-06 Diesel Fuel Supplement, Amber, 80 oz, G5573237: Effective in all diesel fuels, including ULSD and biodiesel blends containing up to 20% biodiesel Prevents gelling in temperatures as low as -40 degrees F; boosts cetane up to 4 numbers for fast cold starts Contains anti-icing additives to protect against fuel filter icing Slickdiesel for improved fuel lubrication and protection against low and ultra-low sulfur diesel Item type: diesel fuel supplement Brand: Power Service Products Manufacturer part number: 1080-06 Power service diesel supplement treats up to 250 gallons Size/net weight: 4.9 lbs

7. STP 78568 Complete Fuel System Cleaner - 5.25 Fluid Ounces

STP High Mileage Complete Fuel System Cleaner contains the highest level of detergents of any STP formula. It helps clean your entire fuel system to restore its optimum operating condition. The advanced formula helps clean fuel injectors, carburetors, intake valves and ports, combustion chambers, cylinder heads and piston tops. It contains jet fuel, a high-quality carrier of active ingredients.

Cleans your entire fuel system Restores its optimum operating condition Helps clean fuel injectors, carburetors, intake valves and more Contains jet fuel

8. STP Super Concentrated Fuel Injector Cleaner - 5.25 FL OZ (2 Count)

STP Super Concentrated Fuel Injector Cleaner - 5.25 FL OZ (2 Count) STP Super Concentrated Fuel Injector Cleaner helps unclog dirty fuel injectors to restore performance to your vehicle. Safe for gasoline engines, this STP fuel additive uses concentrated detergents to dissolve and remove carbon, gum and varnish deposits from the fuel injector that can cause problems such as hard starts, lost acceleration and rough idling. Jet fuel in this STP fuel injector cleaner is a high-quality carrier of the active ingredients. Use this car care product with every oil change or every 4,000 miles. It's compatible with cap-less gas systems and can help restore lost power and save gas.

Two 5.25 fl oz bottles of STP Super Concentrated Fuel Injector Cleaner Car Care Product This fuel additive contains concentrated detergents for effective fuel injector cleaning and easy car care Dissolves and removes carbon, gum and varnish deposits that can be harmful to fuel injectors Fuel additive uses jet fuel as a carrier to deliver the active ingredients in the cleaner effectively STP fuel injector cleaner helps to prevent hard stops, lost acceleration and rough idling and helps save gas Use this fuel injector cleaner in your vehicle with every oil change or every 4,000 miles This fuel injector cleaning additive is compatible with all types of gasoline engines including cap-less gas systems

9. Power Service Diesel Fuel Supplement 01016-09 Anti-Gel Automotive Additive Bottle, 16 oz

Fuel treatments help boost octane ratings, improve lubrication, and limit corrosion within a fuel system. Here are some important details for Power Service Products Diesel Fuel Supplement. Application: Prevents Diesel Fuel Gelling, Type: Fuel Additive, Color: Amber.FeaturesSize/Net Weight: 1.23 lb.Type: Anti-GelSize: 16 oz.Container Type: BottleItem: Diesel Supplement and Cetane BoosterPackage Quantity: 1Container Size: 16 oz.Color: AmberSub-Category: Fuel Additives and StabilizersAppearance: Liquid

Power Service Diesel Fuel Supplement 01016-09 Anti-Gel Automotive Additive Bottle, 16 oz Item Type: Diesel Fuel Supplement Brand: POWER SERVICE PRODUCTS Manufacturer Part Number: 01016-09 Application: Prevents diesel fuel gelling Type: Fuel additive

10. FJC 2445 DyEstercool Oil (Quart)

Features and Benefits: Contains FJC universal fluorescent leak detection dye Compatible with R-134a and R-12 Compatible with mineral, ester, paraffin and PAG oil Can be detected using any standard UV light Saves time over existing methods of dye injection Contains fluorescent leak detection dye. Can be used in any R12 or R134a mobile air conditioning system.

Contains FJC universal fluorescent leak detection dye Compatible with R-134a and R-12 Compatible with mineral, ester, paraffin and PAG oil Can be detected using any standard UV light Saves time over existing methods of dye injection