Best Fuel Additive for 4 Stroke Dirt Bike

You have probably run into a list of the best fuel additive for 4-stroke dirt bike while perusing the internet.

But each time it seems too good to be true. Cheap fuel additives, which promise to give your engine that extra power and keep it clean.

The best part is how easy the best fuel additive seems to work. You only need to pour them into the gas tank, and you get a whole new efficient fuel system. That’s is apparent what most fuel additives that you will come across promise.

On my part, the daunting task lies in answering the question of what fuel additives work. You don’t expect all fuel additives to deliver. Some will fail terribly, even destroying your 4-stroke ride in the process. In short, I would say that not all fuel additives are equal.

Some are outright to take your money. Read on and learn the best fuel additive for a four-stroke dirt bike. You may get a product to finally get your 4-stroke’s inner working clean and reduce the need to perform costly maintenance in the process.

Best Fuel Additive for 4 Stroke Dirt BikePin

(Here’s a quick glance of what my top dirt bike fuel additive are. They contain paid links to Amazon. You will not be charged a thing if you decide to buy anything from Amazon using these links)

  1. Klotz Octane Booster
  2. Slick 50 750002 Recharged High Mileage Engine Treatment
  3. Star Tron® Enzyme Fuel Treatment
  4. Royal Purple Max-Clean Fuel Stabilizer system
  5. Klotz KL-640 Nitro Power Additive
  6. Sea Foam
  7. Stabil fuel stabilizer
  8. Marvel Mystery Oil


Best Fuel Additive for 4-Stroke Dirt Bike

Klotz Octane Booster


Product Details

  • Increases pump gasoline octane up to 10 numbers
  • Tetraethyl lead substitute for added lubricity
  • Stabilizes flame front and controls burn speed

The Klotz Octane Booster is the best fuel additive for 4 stroke dirt bike Amazon. It has plenty of excellent feedback and is the most famous name in the octane booster market.

Since it’s an octane booster, this Klotz fuel additive is a popular recommendation. You will find those octane boosters are necessary for protection against engine knock, pre-ignition, and detonation.

They are also handy when you want to boost your engine. For instance, the Klotz Octane Booster promises to increase the gasoline octane pump for up to 10 numbers.

The Klotz octane booster would, thus, help increase the octane levels and reduce issues rising from low octane ratings.

If you are asking yourself how this help, you will see your engine performing better and for a longer time.

Another recommendation for the Klotz additive is its compatibility with gasoline or ethanol enriched engines.

That comes due to the octane booster’s capabilities to work in premix situations and absorb moisture.

According to the company, the octane booster is also a fuel and carburetor cleaner.

It only adds to the already impressive list of features that warrant its position as the best fuel additive for a four-stroke dirt bike. It’s a 3-in-1 product.

Slick 50 Recharged High Mileage Engine Treatment

Slick 50 Recharged High Mileage Engine TreatmentPin

Product Details

  • Fully Formulated 10w-30 Motor Oil- Meets GF5 requirements which helps reduce emissions and maximize fuel economy.
  • Friction Modifier- Creates an enhanced protective layer of lubrication to minimize heat produced by friction.
  • Seal Revitalizer- Formulated to revitalize engine seals and slow or stop leaks.
  • Powerful Detergents- Removes sludge and fights future build up.
  • Emission System Shield- Formulated to revitalize engine seals and slow or stop leaks.

The Slick 50 Recharged High Mileage Engine Treatment is a fuel additive made for 4-stroke engines seeking to restore performance.

As per the bottle, the formulation helps restore high mileage in engines and keep them running like new.

The brand, Slick 50, uses a proprietary formulation that packs enhanced additives for high mileage engines.

That makes the Slick 50 Recharged High Mileage Engine Treatment a high mileage solution with plenty of high-end capabilities.

One of them is the ability of the fuel additive to protect against potential friction, wear, and heat.

You can say it revitalizes the engine even to improve oil consumption in older models.

You will also love that this fuel additive packs powerful detergents. Unlike other engine treatment products, the Slick 50 Recharged High Mileage Engine Treatment is capable of preventing oil sludge buildup in the engine compartments.

The last selling point in the Slick 50 Recharged High Mileage Engine Treatment would be its excellent compatible aspect.

Now, for fuel additives, most of them are gimmicks and rarely work.

In the Slick 50, it’s different since the product is compatible with all motor and monograde oils of different categories.

Even the conventional and synthetic oil types are consistent with the Slick 50 Recharged High Mileage Engine Treatment.

Star Tron® Enzyme Fuel Treatment

Star Tron® Enzyme Fuel TreatmentPin

Product Details

  • Stabilizes Gasoline for up to 2 years
  • Makes all engines start easily, run smoothly; improves performance
  • Removes gum and carbon deposits
  • Works in all engines and in all fuel
  • Helps rejuvenate old fuel
  • Cleans carbs, injectors & valves
  • Reduces emissions

The Star Tron® Enzyme Fuel Treatment is a popular enzyme-based fuel additive for curing and preventing ethanol fuel problems.

As you know, not all dirt bikes run on full gasoline, and some are incorporating ethanol made products.

According to the company, the Star Tron® Enzyme Fuel Treatment eliminates ethanol issues by preventing fuel separation.

Since there is alcohol content in the ethanol, fuel separation, especially in cold weather, is common.

You will also come across the Star Tron® Enzyme Fuel Treatment is an injector cleaner.

It cleans the valves and removes accumulating carbon deposits to ensure better fuel efficiency and low emissions.

The formula behind the fuel additive is also a fuel stabilizer for everyday use.

If you are looking for seasonal storage, you can also opt for the Star Tron® Enzyme Fuel Treatment. It stabilizes fuel for up to 2 years while you are away.

I would also recommend its cheap use as per the applications since it’s safe to use across different engines.

You can practically make it an option for your different dirt bikes or even car.

Royal Purple Max-Clean Fuel Stabilizer system

Royal Purple Max-Clean Fuel Stabilizer systemPin

Product Details

  • Improve fuel economy and restore horsepower
  • Reduce hydrocarbon, nitrogen oxide and carbon monoxide emissions
  • Prevent rough idle, hesitation, and stalling
  • Prevent premature spark plug fouling
  • Reduce deposit-related engine knocking and pinging
  • Stabilize fuel during off-season and storage
  • Superior corrosion and oxidation inhibitor

You would also have to rethink the next time you come across the Royal Purple Max-Clean Fuel Stabilizer system.

It is a contender for the best fuel additive for a 4-stroke dirt bike.

The reputation is even exceeding expectations with the Royal Purple Max-Clean Fuel Stabilizer formulation finding use in all types of engines.

For starters, the Royal Purple Max-Clean Fuel Stabilizer system has been the go-to fuel additive for riders.

It’s utterly synthetic with a state-of-the-art formulation that makes it a 3-in-1 product.

Purchasing this Royal Purple product gets you a fuel stabilizer, injector, and carburetor cleaner.

The intake valves and combustion chambers also stand to gain in terms of efficiency.

You will notice that the Royal Purple Max-Clean Fuel Stabilizer system restores the fuel economy and reduces carbon emissions.

If you are environmentally considerate, you can also bet on the safety of the Royal Purple Max-Clean Fuel Stabilizer system.

It meets the EPA/CARB regulations, which means it’s safe for use in diesel and gasoline engines.

Ethanol blends of biofuels are also compatible with the Royal Purple Max-Clean Fuel Stabilizer.

Klotz KL-640 Nitro Power Additive

Klotz KL-640 Nitro Power AdditivePin

Product Details

  • IOxygenating power additive
  • Developed for gasoline, methanol and diesel fuels
  • 50% Nitropropane, 50% Koolinal
  • Koolinal is a blending agent that resists detonation and pre-ignition
  • Extracts maximum HP from stock and modified engines

Your 4-stroke dirt bike has more to gain from the Klotz KL-640 Nitro Power Additive.

While it will not straight-up add your octane rating, you can expect the Klotz KL-640 Nitro Power Additive to increase your power output.

According to Klotz, it’s an oxygenated fuel with power additive capabilities for most horsepower.

Stock and modified engines can, thus, use the fuel additive and see their horsepower increase by 7 percent.

Alongside the power, the Klotz KL-640 Nitro Power Additive also improves the acceleration by increasing the engine jets output.

The technical aspect of this would be torque.

A better jet setting in the engine substantially increases the power for you to outrun your competition.

For 4-stroke engines, the Klotz KL-640 Nitro Power Additive will need one to use 4 oz. Per gallon.

Sea Foam

Sea FoamPin

Product Details

  • The product is sf16 16oz motor tune up
  • Easy and simple use kit
  • 100 percent pure petroleum
  • Pea registered product
  • Liquefies gum and varnish deposits or internal engine contaminants
  • 100 percent pure petroleum
  • EPA registered product

Most dirt bike riders have come across the Sea foam.

It is a stuff of legend that practicality does everything necessary in the world of fuel additives.

According to the brand, a bottle of the sea foam solution gets you a motor treatment solution, carburetor cleaner, and a fuel additive.

Besides, you also get a fuel stabilizer, fuel injector, and intake valve cleaner.

All the cleaning properties work by dissolving oil deposits found in the inside of the engine.

The cleaning aspects go further to include refining the fuel systems.

According to the instructions, pouring the Sea Foam inside guarantees a clean timing of all the fuel residue.

It will consist of waste found in parts such as the cylinders, pistons, intake valves, passageways, and other internal engine parts.

On the matter of formulation, the Sea Foam solution is 100 percent pure petroleum.

However, you will relish that it is a safe and effective solution that you can add to gasoline or diesel fuel.

The brand affirms this with their EPA and FDA approval. That means the Sea Foam undergoes an evaluation to find out it’s safe for consumer use.

Stabil Fuel Stabilizer

STA-BIL Storage Fuel Stabilizer Pin

Product Details

  • Keeps fuel fresh for up to 24 months during storage
  • Eliminates the need to drain the fuel prior to storage
  • Ensures a quick & easy start after storage
  • Prevents gum and varnish build-up
  • Effective in ALL gasoline, including ethanol blended gas
  • For ALL gasoline engines, including 2-cycle
  • Made in the U.S.A.

If you plan to use your 4-stroke dirt bike less than the Stabil fuel stabilizer is the fuel additive for you.

It keeps the fuel fresh and clean for long periods without contamination.

The Stabil brand estimates that the fuel stabilizer can keep your fuel fresh for almost two years.

That is what the company promises, and much of the feedback agrees.

On the specifications, the Stabil fuel stabilizer is a glycol-based fuel product that works like antifreeze.

Once you put the fuel stabilizer in the tank, it absorbs water to keep the fuel fresh.

You will also notice that absorbing the engine moisture prevents potential corrosion inside the compartments.

Like most fuel additives in this list, the Stabil fuel stabilizer is also a carburetor and fuel injector.

The product has a reputation of offering adequate protection against gum, rust, and corrosion.

It also prolongs the life of different engine models, not just 4-strokes, by protecting the engine from varnish.

You won’t have to drain your fuel each time you plan on storing your dirt bike.

But, as a precaution, the Stabil fuel stabilizer requires no jostling since it will destroy the additive’s layer.

That makes it a less ideal choice for dirt bikes due to the hops and jumps every time.

Marvel Mystery Oil

Marvel Mystery OilPin

Product Details

  • Helps improve fuel economy
  • Cleans and lubricates fuel injectors and carburetors
  • Reduces and prevents varnish and gum build-up
  • Prevents valve sticking and clatter

Four-stroke dirt bike owners are also raving about using the Marvel Mystery Oil on their rides.

According to many, the red liquid is providing quite the ecstasy when it comes to fuel additives for dirt bike systems.

Much of the praise, however, lies in its efficient running and the lubrication aspects.

The first extra touch with the Marvel Mystery Oil would be its ability to destroy rust.

Since rust is the primary concern inside your 4-stroke engine, the Marvel Mystery Oil fights it.

The fuel additive forms an active layer or film of oil inside the engine compartments.

With this layer, the Marvel Mystery Oil keeps water from destroying away the engine parts.

Protecting the critical parts of the engine will also result in better gas mileage for your dirt bike.

Since the corrosion no longer hinders the components, the wearing out reduces and increases the number of RPMs.

As a result, you can expect your gas mileage to decrease and save you that pump money.

The Marvel Mystery Oil would not be the best fuel additive for 4 stroke dirt bike without a cleaning capability.

In this case, this fuel additive helps clean out the fuel systems using both synthetic or conventional oil blends.

The same goes for dirt bikes using gas or diesel engines. But, you will need to replace 20 percent of your dirt bike’s oil.

As I also found out, Marvel Mystery Oil is an oil additive to thin your oil. Its most significant use is during the winter season when engine issues tend to happen.

Using the Marvel Mystery Oil regularly thins the fuel for a smooth flowing despite the cold.

Just be sure not to thin it too much as it might drop the engine protection in place.


4 stroke engine enthusiasts can rave about how their engines are work of art.

But as you see, the right dirt bike and fuel additive give you an even better boost, power, and reputation for your dirt bikes.

Some of the additives I got to review also save you a ton of money in maintenance and safety checks inside your engine.

In essence, picking the best fuel additive for a 4 stroke dirt bike can go along way in determining a lot.

From the durability, power, to the engine life span, fuel additives can make or break your dirt bike.

So be sure to review from our guide and pick the best brand you are sure suits your dirt bike or event.

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