Best Fuel Additive For 4 Stroke Outboard in 2022: Top 10 Picks

Sometimes it might be quite difficult to find the best fuel additive for 4 stroke outboard. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this fuel additive for 4 stroke outboard buying guide.

Our Favorite Picks:

The 10 Top Fuel Additive For 4 Stroke Outboard Reviews:

Bestseller No. 1
Mercury Quickare Fuel Treatment Additive - ‎8M0047920
  • Great for cleaning up existing deposits in untreated fuel lines, tanks, carburetors, injectors, intake valves, and spark plugs
  • Keeps your fuel fresh for up to three months
  • Can be used in all 2 and 4 cycle carbureted and fuel-injected gasoline engines
  • Use one ounce to treat every 10 gallons of fuel.
Bestseller No. 2
STA-BIL Storage Fuel Stabilizer - Guaranteed To Keep Fuel Fresh Fuel Up To Two Years - Effective In All Gasoline Including All Ethanol Blended Fuels - For Quick, Easy Starts, 4 fl. oz. (22205) , Red
  • 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
  • Prevents gum and varnish build-up
  • Effective in all gasoline, including Ethanol blends
SaleBestseller No. 3
Star Tron Enzyme Fuel Treatment Concentrate, 8 Fl. Oz. – Treats up to 128 Gallons – Rejuvenate & Stabilize Old Gasoline, Cure Ethanol Problems, Improve MPG, Reduce Emissions, Increase Horsepower
  • 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.
  • VERSATILE – This revolutionary fuel stabilizer utilizes enzyme technology to enhance the performance of boats, automobiles, trucks, RVs, tractors, farm equipment, generators, lawnmowers, lawn equipment, oil burning furnaces and all other small engines.
  • SAFE FOR ALL ENGINES – Star Tron Enzyme Fuel Treatment concentrated formula #930XX is economical to use in large and small applications. It works with ethanol fuel and is safe for use in all engines (including 2-cycle pre-mix).
SaleBestseller No. 4
Yamaha Outboard Ring Free Plus Fuel Additive Quart (32 ounce) ACC-RNGFR-PL-32
  • Synthetic PLUS formula provides superior deposit control, cleaning fuel injectors, carburetors, intake valves, intake ports, and combustion chambers
  • Featuring metal filmers, it also protects silver solder, copper, aluminum, and steel in a fuel system from the corrosive affects of ethanol sulfate salt.
  • Yamalube Oils
  • Yamalube
Bestseller No. 5
Mercury Marine Quickleen Engine and Fuel System Cleaner, 12 Ounces 92-8M0047931
  • Quickly and thooughly remove carbon deposits from carberators and injectors, intake valves, spark plugs, piston crowns & cylinder heads
  • Prevent engine knocking and piston seize up
  • Extend spark plug life
  • Use with Mercury Quickstor and Mercury Quickare
SaleBestseller No. 6
YAMAHA ACC-RNGFR-PL-12 Yamalube Ring-Free Fuel Additive
  • 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
  • Use with Yama lube Fuel Stabilizer and Conditioner PLUS to prevent any harmful effects
Bestseller No. 7
STA-BIL 360 Marine Ethanol Treatment and Fuel Stabilizer - Prevents Corrosion - Helps Clean Fuel System For Improved In-Season Performance - Treats Up To 80 Gallons, 8 fl. oz. (22239) , Black
  • specs: Sta-Bil Marine Formula Fuel Stabilizer, Size: 8 oz, Notes: 1 oz. treats 10 gallons of fuel 8 fl. oz. bottle treats 80 gallons of fuel, Double the corrosion prevention and 4 times the fuel system cleaner as regular Sta-Bil, Extra corrosion protection and fuel system leaning, Recommended for ethanol blends, Recommended to be used at every fill up, not just for seasonal storage, Safe to use in all lawnmowers, tractors, trimmer and all outdoor power equipment
  • Stens one-year warranty ensures reliability and performance for every part.
  • Stens branded parts are trusted by professional dealers to perform OEM quality repairs. The Stens name is featured on all Genuine Stens product packaging.
SaleBestseller No. 8
Quicksilver 25W-50 High Performance Synthetic Marine Engine Oil - 1 Gallon
  • Quicksilver Brand Synthetic Blend SAE 25W50
  • Recommended for Mercury Verado and other high performance marine engines.
  • Provides outstanding wear and corrosion protection to help extend engine life
  • It maintains its viscosity, protects against varnish buildup and sludge formation and exceeds the rust protection requirements for NMMA certification.
  • Meets or exceeds all marine engine manufacturer's warranty requirements and recommendations for use of an FC-W marine engine oil.
Bestseller No. 9
Mercury Marine Quickare Fuel Treatment, 12 Ounces 92-8M0047930
  • Quickcare complete ethanol treatment
  • Treat 120 gallons
  • Maximize engine performance with all grades of gasoline
  • Help control corrosion, gum and varnish build up and phase separation assiciated with ethanol blended fuel
  • Help control moisture and corrosion problems associated with non ethanol fuel, clean up existing gum and varnish deposits from fuel lines, tanks, carb, injectors and spark plugs
Bestseller No. 10
MERCURY Genuine Quickstor Fuel Stabilizer 12Oz - 8M0047932
  • One (1) 12oz. bottle - 1 ounce treats 5 gallons, 12 ounce bottle treats 60 gallons
  • Add to fuel before long-term storage of your engine, stabilize fuel for up to a year
  • Prevents regular and ethanol-blended fuel from breaking down and oxidizing
  • Prevent gum and varnish from forming in the fuel and settling in fuel lines and tanks, carburetors and injectors
  • Safe for catalyzed engines

Last update on 2022-10-01 / Affiliate links / Images from Amazon Product Advertising API

How to find the best fuel additive for 4 stroke outboard?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best fuel additive for 4 stroke outboard for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good fuel additive for 4 stroke outboard recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

  • What features does the fuel additive for 4 stroke outboard need to have to be perfect for my needs?
  • What is my budget?
  • Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for fuel additive for 4 stroke outboard to find what you’re looking for:

Brand

In some cases, the brand of fuel additive for 4 stroke outboard is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.

Features

The features in any given fuel additive for 4 stroke outboard are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.

Reviews

Customer reviews about fuel additive for 4 stroke outboard are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.

Quality

Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare fuel additive for 4 stroke outboard quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.

Warranty

Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.

Conclusion

The quest to find the best fuel additive for 4 stroke outboard can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.