Best Gasoline Fuel Additives in 2026

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

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.

Product 1: Mixable with all commercially available motor oils

Product 1: Stable even under high thermal and dynamic permanent loads

Product 1: No deposits and absolutely compatible with all commonly used filter systems

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

Item Package Weight - 1.99959271634 Pounds

Item Package Quantity - 1

Helps your entire fuel system run smoother and last longer

Cleans fuel injectors and carburetor passageways

Cleans intake valves and chamber deposits

Improves power and efficiency in two and four stroke engines

Removes and prevents carbon and varnish deposits from injectors, carburetors, intake valves, intake ports and combustion chambers

Fights corrosive elements of sulfur in Ethanol blended fuels

EXTEND THE LIFE OF YOUR ENGINE: zMAX Micro-lubricant Engine Formula is simple and easy to use. Formula soaks into metal surfaces, which improves lubricity and reduces deposit build-up while boosting performance and protecting vital parts in your vehicle.

ENGINE EFFICIENCY: Perfect to use in new and used gasoline or diesel engines with each oil change. Easily pour zMAX into the engine oil to gain efficient combustion resulting in more power.

IMPROVES FUEL MILEAGE: Make zMAX a part of your car or truck’s routine maintenance! Add the cost-saving and eco-friendly engine treatment to your vehicle every 6k miles to reduce engine wear, lower emissions and keep your engine running smoothly.

Treats Up To 25 Gallons ps, lost acceleration and rough idling for improved performance

Jet fuel serves as the carrier for the active ingredien Helps Recover Lost Mpg And Reduce Exhaust Emissionst nts, creating a high-quality additive for easy auto care

Add this fuel injector treatment to your vehicle regularly when you fill your gas tank Friction modifier in the fuel additive combats upper cylinder friction

ENZYME FUEL TREATMENT – Star Tron Enzyme Fuel Treatment Concentrate improves the combustibility of all fuel - meaning more power and better fuel economy. It keeps working to clean your fuel delivery system, so your engines start easily and run strong.

STABILIZES FUEL FOR UP TO 2 YEARS – This fuel additive is ideal for everyday use and seasonal storage. It can stabilize fuel for up to 2 years and can help rejuvenate old, sub-spec fuel.

MAX PERFORMANCE – This gasoline stabilizer helps improve MPG, eliminate black soot and exhaust stains, reduce emissions, remove carbon build-up, and eliminate and prevent ethanol fuel problems for maximum performance.

Adds Protection – Increases fuel lubricity by up to 56% for an added layer of protection that keeps fuel pumps and injectors from unnecessary damage or failure

No Harmful Ingredients – LX4 is formulated without harmful solvents or alcohol making it a safe and effective fuel treatment for all systems and engines

Extends Fuel System Life – Protects any fuel system from harsh ethanol or diesel fuels and maintains a smoothly working engine and fuel system, keeping it healthy for even longer

Maximizes engine performance with all grades of gasoline, including ethanol-blend fuel

Removes varnish and gum deposits from fuel lines, tanks, carburetors, injectors, intake valves and spark plugs

Help control corrosion, gum and varnish build-up and phase separation associated with ethanol-blended gasoline

Optimizes engine horsepower and performance - for use in all diesel and gasoline engines

Improves fuel economy by reducing friction in your engine - Protects and extends oil life by 30%

Reduces wear on metal components, thus increasing part life / Eliminates lifter and other objectionable noise on startup, especially in cold weather

FIXES ROUGH RUNNING ENGINES – STA-BIL Fast Fix eats away at gum and varnish that cause rough starts and no starts in your small engine equipment. This easy-to-use fuel additive combats the effects of ethanol blended gasoline

ELIMINATES WATER – This fuel injector cleaner helps to remove water that may get into your fuel system. Penetrating deep into the fuel line, this simple fuel additive prevents the need to disassemble the engine. The 8 oz. bottle of this alcohol-free fuel additive treats up to 20 gallons of fuel

VERSATILE – Compatible with all small engines, adding STA-BIL Fast Fix to your 2-cycle or 4-cycle small engine cleans carburetors and injectors while acting as a water remover. Use this product in your lawn mower, chainsaw, trimmer, snow blower, generator, and more

Cleans Fuel System – Deeply cleans, lubricates, and protects any gasoline fuel system and engine including valves, pumps, injectors, rings, pistons, and upper cylinders

Increases Fuel Economy – Boosts MPG by up to 7.9% after the fuel system is fully cleaned by providing an effective boost in combustion, fuel economy, and engine power

Fixes Issues – Resolves several symptoms of a rough-running engines in one treatment, including poor fuel economy, rough idling, clogged fuel injectors, and loss of engine power

Clean and improve your fuel system with Small Engine Pro, a gasoline/oil additive that helps restore lost engine power and performance, by cleaning out gum and varnish

Keeps internal engine components lubricated and free, providing longevity to internal engine parts

With optimal lubrication and cleaning, this formula effectively quiets noisy engines

Directions: Add about 1 ounce per 10 gallon of gasoline or Diesel fuel at least every 3rd to 4th fill-up on most passenger vehicles; larger engines use same amount every fill-up

Motorkote fuel optimizer is safe for use in all catalytic converters, emissions systems and diesel particulate filter

Cleans fuel system and is a great storage solution for winterizing tanks and equipment

Gas treatment and injector cleaner for use with all grades of gasoline and ethanol-blend fuel

Quickly and thoroughly removes carbon deposits from carburetors, injectors, intake valves, spark plugs, piston crowns and cylinder heads

Prevents engine knocking and piston seize-up

Adds Protection – Increases fuel lubricity by up to 56% for an added layer of protection that keeps fuel pumps and injectors from unnecessary damage or failure

No Harmful Ingredients – LX4 is formulated without harmful solvents or alcohol making it a safe and effective fuel treatment for all systems and engines

Extends Fuel System Life – Protects any fuel system from harsh ethanol or diesel fuels and maintains a smoothly working engine and fuel system, keeping it healthy for even longer

Specially Formulated for Motor Fuels

Eliminates Harsh Alcohol Order

A proven crowd pleaser

CleanBoost 8oz. Maxx is a small and convenient size to take with you on a road trip. This one 8oz. bottle will treat up to 240 gallons of either diesel or gasoline.

This special squeeze-type container allows just the right amount of Maxx into the built in chamber for easy dosing of your fuel system.

Feel the power and smoothness of your engine as CleanBoost Maxx begins to go to work destroying carbon deposits, removing harmful water acumulation, blowing out slagging and cold-end corrosion.

ADD A DISTINCTIVE SMELL TO YOUR EXHAUST FUMES and eliminate unpleasant odor

HIGHLY CONCENTRATED AND SAFE for all internal combustion engines, carburetors, oxygen sensors, and catalytic converters

WILL NOT RESTRICT OR BOOST ENGINE PERFORMANCE for peace of mind

New

ADD A DISTINCTIVE SMELL TO YOUR EXHAUST FUMES and eliminate unpleasant odor

HIGHLY CONCENTRATED AND SAFE for all internal combustion engines

WILL NOT RESTRICT OR BOOST ENGINE PERFORMANCE for peace of mind

Vehicle Storage - HappyFuel added to your gasoline will stabilize your fuel and slow down the oxidation process. Your vehicle will be ready for use when you are.

Use the Best - We’ve researched the best possible additives and created HappyFuel to bring you the highest quality and best performing fuel stabilizer available.

Backed by Science – We thoroughly tested against ASTM D525 and developed the highest performing fuel stabilizer on the market.

New

First, other products on the market only raise the octane a few points but do not raise the octane to that of racing fuel. RACE GAS has been tested and proven to increase the octane of pump gas to as high as 100 to 105 AKI, (R+M/2), when blended with gasoline as specified in our blend chart.

Second, other products on the market only increase the octane. RACE GAS also raises the chemical / BTU energy of base fuel to equal that of racing fuel. This is very important as low energy with high octane will lean out the engine significantly at Wide Open Throttle.

Lastly, RACE GAS blend results are shown in Anti Knock Index, (AKI) or R+M/2. This is the same measurement that race fuel manufactures use to measure the octane of their fuel. Other products on the market blend to the Research Octane Number, (RON). The RON number is a poor representation of octane as it represents the performance of the fuel in the engine at idle. AKI represents the performance of the fuel under load.

Keeps fuel fresh for up to 24 months during storage

Eliminates need to drain fuel prior to storage

Ensures quick, easy starts after storage

8oz

Treats 48 gallons

Unique enzyme formula improves performances of all engines

ADD A DISTINCTIVE SMELL TO YOUR EXHAUST FUMES and eliminate unpleasant odor

HIGHLY CONCENTRATED AND SAFE for all internal combustion engines, carburetors, oxygen sensors, and catalytic converters

WILL NOT RESTRICT OR BOOST ENGINE PERFORMANCE for peace of mind

Guaranteed to improve the lubricity of gasoline, protects the entire fuel system and its individual elements from corrosion, especially: all types of injectors, carburetor jets, fuel pumps, intake valves and the combustion chamber, prevents excessive fuel and oil consumption;

All other things being equal, it increases the engine power and acceleration of the car, including by improving the lubricating properties of gasoline, reducing friction in the cylinder zones and ensuring optimal fuel dispersion;

Reducing carbon formation, smoke and toxicity, increases the life of spark plugs, oxygen sensors, catalysts, injectors (injectors) and the engine as a whole;