Best Marine Fuel Additive in 2022: Our Top 10 Picks

Sometimes it might be quite difficult to find the best marine fuel additive. 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 marine fuel additive buying guide.

Our 10 Recommendations:

Best Marine Fuel Additive Reviews:

SaleBestseller No. 1
STA-BIL 360 Marine Ethanol Treatment & Fuel Stabilizer - Prevents Rust and Corrosion, Helps Clean Fuel System For Improved In-Season Performance, Treats Up To 320 Gallons, 32oz (22240) , Blue
  • PREVENTS CORROSION – STA-BIL 360 Marine Ethanol Treatment & Fuel Stabilizer is the ultimate treatment and protection against ethanol blended fuels. This formula contains PEA fuel system cleaners, and it removes water from your gas tank which prevents gum, varnish, rust, and corrosion from appearing.
  • IMPROVES PERFORMANCE – By combating the effects of harsh marine climates, this fuel additive helps to clean your fuel system. With gasoline pumping through your engine, it is imperative to use this fuel treatment in fresh gas at every fill up in order to ensure your engine is operating at peak performance.
  • VERSATILE – STA-BIL 360 Marine is an alcohol-free water remover that is very concentrated, and the 32 oz. bottle can be used to treat up to 320 gallons of fuel. This marine fuel stabilizer keeps fuel fresh up to 12 months, and it is safe for use in your boat, jet ski, and every gasoline-powered watersport engine.
  • DIRECTIONS – Bottle Directions: To measure small quantities: remove small cap and seal (on long neck), squeeze bottle to desired level, and pour. To measure large quantities: remove large cap and seal, pour (measurements on bottle side). Usage Directions: 1 oz (30 mL) treats up to 10 gallons (38 L) of fuel. Recommended for use at every fill up in season for year-round performance and protection.
  • SHELF LIFE – All STA-BIL branded products are good for use up to 2 years after the bottle was opened. Be sure to mark the date you opened the bottle on the back of your package! Proudly made in the USA by a family-owned company in Chicago, Illinois.
Bestseller No. 2
Sea Foam SF-16-2PK Motor Treatment Multi-Use, 16 Ounce, Pack of 2, 16. Fluid_Ounces
  • Dissolves and clean fuel deposits and sticky residues from gas and diesel fuel injectors, carburetors, and combustion chambers
  • Package dimensions :5.0" L x5.0" W x8.25" H
  • Does NOT have harsh detergent or abrasive chemicals that can harm your engine
  • Country of origin :United States
SaleBestseller No. 3
Chevron Techron Protection Plus Marine Fuel System Treatment, 10 oz, Pack of 1
  • Alcohol-free, emulsifier-free unique formulation that does not contribute to water uptake
  • Best in Class corrosion protection of the entire fuel system in both fresh water and salt water environments
  • Stabilizes fuel up to 2 years so you can store with confidence
  • Techron marine cleans carbon deposits, dissolves gum and varnish buildup, and helps prevent new deposit formation – so you can enjoy optimized engine performance with more power
Bestseller No. 4
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. 5
Star Tron Enzyme Fuel Treatment - Concentrated Formula 32 oz - Treats 512 Gallons
  • 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. 6
STAR BRITE Star Tron Enzyme Fuel Treatment - Concentrated Gasoline Formula - 1 oz. Treats 16 Gallons - 32 Fl Oz (093032)
  • Item Package Dimension:10.08 Inches L X4.07 Inches W X2.52 Inches H
  • Item Package Weight:2.5 Pounds
  • Product Type:Fishing Equipment
  • Country Of Origin: China
  • Concentrated formula #930XX is economical to use in large and small applications; safe for use in all engines (including 2-cycle pre-mix)
SaleBestseller No. 7
Quicksilver 8M0047921 Quickleen Engine & Fuel System Cleaner, 12 Oz - for All Grades of Gas and Ethanol Blends
  • Maximize engine performance with all grades of gasoline
  • 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.
  • Extends spark plug life.
  • Can be used at every fuel tank fill-up.One ounce treats five gallons of gasoline.
Bestseller No. 8
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. 9
Fuel Ox Marine - Complete Fuel Treatment and Combustion Catalyst - Additive for Gas or Diesel - for Inboard or Outboard Motors - Treats Fuel for Boats or Jet Skis - Treats 240 Gallons - 3oz Bottle
  • ✔ INCREASES FUEL ECONOMY : Fuel Ox Marine contains a patented combustion catalyst that provides a more complete combustion. This allows for more productive burn of fuel.
  • ✔ PROTECTS AGAINST ETHANOL : Fuel Ox Marine coats fuel tank and system to prevent corrosion from ethanol found in gasoline.
  • ✔ REMOVES WATER : Fuel Ox Marine is a demulsifier for the water that is in fuel. It will separate the water suspended in gas or diesel and filter out through your boat's or watercraft's racors, separators, or filters. It prevents water from passing through engine and significantly slows the process of phase separation.
  • ✔ BOOSTS POWER : Fuel Ox Marine contains a patented combustion catalyst that provides a more complete combustion. This more complete burn allows for more BTUs to be burned increasing octane two points and increasing the power of the boat or watercraft.
  • ✔ 1OZ TREATS UP TO 80 GALLONS OF GAS OR DIESEL : Fuel Ox Marine has a highly concentrated formula that treats both gas or diesel for a small and convenient inventory.

Last update on 2022-08-19 / Affiliate links / Images from Amazon Product Advertising API

How to find the best marine fuel additive?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best marine fuel additive 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 marine fuel additive 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 marine fuel additive 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 marine fuel additive to find what you’re looking for:

Brand

In some cases, the brand of marine fuel additive 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 marine fuel additive 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 marine fuel additive 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 marine fuel additive 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 marine fuel additive 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.