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20 Best Fuel Additive For 2 Stroke Outboards (2022 Updated)

Fuel additives are chemicals that are added to gasoline or diesel to improve the performance of the engine. There are many different types of fuel additives, but the most common ones are designed to improve the combustion of the fuel, reduce emissions, or protect the engine from corrosion.

20 Best Fuel Additive For 2 Stroke Outboards

Product Image Product Name Features Price

Star Tron Fuel Treatment, Enzyme – 8 us fl oz (237 ml)

  • Cures and prevents ethanol fuel problems; helps prevent phase separation
  • Makes engines start easily and run smoothly; reduces emissions

Helix 700604500837 Fuel Treatment 5-in-1

  • Eliminates water from fuel systems
  • Works with 2- and 4-stroke engines
  • Revitalizes old gas

Gold Eagle 22264 Sta-Bil Ethanol Gas Treatment – 10 oz

  • Vapor technology protects engine and fuel system above and below the fuel line
  • Helps prevent Ethanol fuel related damage in vehicles and small engines

Star Brite Tron Gasoline Additive 8 oz

  • Quality aftermarket replacement and original parts and accessories
  • Parts that match or exceed OEM standards
  • Reliable and durable with OEM or higher quality

Star Brite Star Tron Enzyme Fuel Treatment – 32 oz

  • Made in: USA
  • Fuel Type: Gasoline

Start Your Engines 21214 Fuel System Revitalizer, 2 oz

  • Additive ensures quick easy starts after extended storage, and ensures smooth idling and performance in season.
  • For all 2 and 4-cycle small engines.

Star Brite 14316 Star Tron Enzyme Fuel Treatment – 16 oz.

  • 16 oz

Sea Foam 20 oz Marine Pro Fuel Treatment

  • Designed to prevent corrosion from moisture and ethanol induced water attraction
  • Bottle container offers easy portability

Sta-Bil Fuel System Stabilizer – 32 fl oz bottle

  • 32 oz

Oregon SF16 Tune Up, Seafoam Motor

  • Genuine, OEM Oregon Replacement Part
  • Oregon replacement tune up, part number SF16

Mercury Quickare Fuel Treatment 12 oz

  • Great for cleaning up existing deposits in untreated fuel lines, tanks, carburetors, injectors, intake valves, and spark plugs.

Gold Eagle 22240 32 oz Marine Formula STA-BIL

  • More than 4 times the fuel system cleaner than in regular STA-BIL
  • Twice the corrosion preventer than in regular STA-BIL
  • For all 2 cycle and 4 cycle gasoline, diesel engines

Star Tron Enzyme Fuel Treatment 1 oz. 2 Pack

  • 2 x 1 oz Treats 12 Gallons

Ethanol Shield Fuel Stabilizer 4 oz.

  • Provides easy 2 stroke and 4 stroke engine starting all year by keeping Fuel fresh, so there’s no need to buy NEW gas after the winter

STA-BIL 22208 Fuel STABILIZER, 8 oz

  • Removes water to prevent corrosion and cleans carburetors and fuel injectors
  • Protects engine from gum, varnish, rust, and corrosion

Lucas Oil 10314 Fuel Stabilizer – 8 oz.

  • Best solution to prevent gasoline breakdown during storage.
  • Cleans, lubricates, and maintains fuel pumps, carburetors, fuel injectors and compression rings.

QuickShot in 8 oz. Bottle (6) Count Pack by AMSOIL | AQSCN-CA

  • 8 oz
Star Tron Fuel Treatment, Enzyme – 8 us fl oz (237 ml)
  • Cures and prevents ethanol fuel problems; helps prevent phase separation
  • Makes engines start easily and run smoothly; reduces emissions
Helix 700604500837 Fuel Treatment 5-in-1
  • Eliminates water from fuel systems
  • Works with 2- and 4-stroke engines
  • Revitalizes old gas
Gold Eagle 22264 Sta-Bil Ethanol Gas Treatment – 10 oz
  • Vapor technology protects engine and fuel system above and below the fuel line
  • Helps prevent Ethanol fuel related damage in vehicles and small engines
Star Brite Tron Gasoline Additive 8 oz
  • Quality aftermarket replacement and original parts and accessories
  • Parts that match or exceed OEM standards
  • Reliable and durable with OEM or higher quality
Star Brite Star Tron Enzyme Fuel Treatment – 32 oz
  • Made in: USA
  • Fuel Type: Gasoline
Start Your Engines 21214 Fuel System Revitalizer, 2 oz
  • Additive ensures quick easy starts after extended storage, and ensures smooth idling and performance in season.
  • For all 2 and 4-cycle small engines.
Star Brite 14316 Star Tron Enzyme Fuel Treatment – 16 oz.
  • 16 oz
Sea Foam 20 oz Marine Pro Fuel Treatment
  • Designed to prevent corrosion from moisture and ethanol induced water attraction
  • Bottle container offers easy portability
Sta-Bil Fuel System Stabilizer – 32 fl oz bottle
  • 32 oz
Oregon SF16 Tune Up, Seafoam Motor
  • Genuine, OEM Oregon Replacement Part
  • Oregon replacement tune up, part number SF16
Mercury Quickare Fuel Treatment 12 oz
  • Great for cleaning up existing deposits in untreated fuel lines, tanks, carburetors, injectors, intake valves, and spark plugs.
Gold Eagle 22240 32 oz Marine Formula STA-BIL
  • More than 4 times the fuel system cleaner than in regular STA-BIL
  • Twice the corrosion preventer than in regular STA-BIL
  • For all 2 cycle and 4 cycle gasoline, diesel engines
Star Tron Enzyme Fuel Treatment 1 oz. 2 Pack
  • 2 x 1 oz Treats 12 Gallons
Ethanol Shield Fuel Stabilizer 4 oz.
  • Provides easy 2 stroke and 4 stroke engine starting all year by keeping Fuel fresh, so there’s no need to buy NEW gas after the winter
STA-BIL 22208 Fuel STABILIZER, 8 oz
  • Removes water to prevent corrosion and cleans carburetors and fuel injectors
  • Protects engine from gum, varnish, rust, and corrosion
Lucas Oil 10314 Fuel Stabilizer – 8 oz.
  • Best solution to prevent gasoline breakdown during storage.
  • Cleans, lubricates, and maintains fuel pumps, carburetors, fuel injectors and compression rings.
QuickShot in 8 oz. Bottle (6) Count Pack by AMSOIL | AQSCN-CA
  • 8 oz

1. Star Tron Fuel Treatment, Enzyme – 8 us fl oz (237 ml)

Star Tron Fuel Treatment, Enzyme - 8 us fl oz (237 ml)

  • Cures and prevents ethanol fuel problems; helps prevent phase separation
  • Makes engines start easily and run smoothly; reduces emissions
  • Cleans valves

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Home Depot

Product Details

Specifications

Details
Units in Package 1
Unit Size 8 oz
Directions Always add Star Tron just before each fuel fill up. Remove cap and pour the prescribed amount into tank. Overdosing is not harmful. Initial dosage: Add 1 fl oz. For every 3 gallons of gasoline. Refills: Add 1 fl. oz. For every 6 gallons of gasoline.
Warnings Danger. Harmful or fatal if swallowed. See back for precautions and first aid. Danger Harmful or fatal if swallowed. Contains Petroleum distillates, hydrotreated light. Do not swallow. Do not breathe vapors. Use in a well ventilated area. Avoid skin contact. Keep away from heat, open flame and sparks. Keep out of reach of children. First Aid: it swallowed or inhaled, call physician, emergency room or Poison Control center immediately for advice about whether or not to induce vomiting. If product comes in contact with skin or eyes, flush with clean water for at least 15 minutes. If irritation persists, seek medical attention.

Reviews From Real Customers

wcs2872
Hunter Ed

2. Helix 700604500837 Fuel Treatment 5-in-1

Helix 700604500837 Fuel Treatment 5-in-1

  • Eliminates water from fuel systems
  • Works with 2- and 4-stroke engines
  • Revitalizes old gas
  • Boosts octane by up to two points
  • Stabilizes fuel for up to two years

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Amazon.com – Seller
eBay
Walmart
Dennis Kirk

Product Details

Specifications

Details
Assembled Product Weight 6 lb
Assembled Product Dimensions (L x W x H) 8.00 x 8.00 x 17.00 Inches

Reviews From Real Customers

Tommy2Shoes
DARRYL
DONALD

3. Gold Eagle 22264 Sta-Bil Ethanol Gas Treatment – 10 oz

Gold Eagle 22264 Sta-Bil Ethanol Gas Treatment - 10 oz

  • Vapor technology protects engine and fuel system above and below the fuel line
  • Helps prevent Ethanol fuel related damage in vehicles and small engines
  • Helps prevent corrosion damage and helps remove water
  • Stabilizes fuel to keep it fresh during storage
  • Helps clean fuel system for improved in-season performance

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Lowe’s

Product Details

Specifications

Details
Units in Package 1
Unit Size 10 fl oz
Directions Usage Directions: 1 oz. (30 ml) treats 5 gallons (19 l) of fuel. Recommended for use at every fill up in season for year round performance & protection.
Warnings Cancer & reproductive harm – www.P65Warnings.ca.gov. Danger: Harmful or fatal if swallowed. Combustible. Read cautions on back panel. Contains: Petroleum distillates (CAS no. 64742-47-8). If swallowed do not induce vomiting. Call physician immediately. Use in well ventilated area. Avoid contact with eyes or skin. Combustible: Do not use near fire, flame or source of ignition. Keep out of reach of children.

Reviews From Real Customers

ss195
FLSwamper
Big Man

4. Star Brite Tron Gasoline Additive 8 oz

Star Brite Tron Gasoline Additive 8 oz

  • Quality aftermarket replacement and original parts and accessories
  • Parts that match or exceed OEM standards
  • Reliable and durable with OEM or higher quality

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Amazon.com
eBay
Walmart
West Marine

Product Details

Specifications

Details
Product Type Fuel Treatment
Brand Name Star Brite
Container Size 8 oz
Compatible Fuels Gasoline

Reviews From Real Customers

dopeyvelour
tony
Rosiest Roses

5. Star Brite Star Tron Enzyme Fuel Treatment – 32 oz

Star Brite Star Tron Enzyme Fuel Treatment - 32 oz

  • Made in: USA
  • Fuel Type: Gasoline

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eBay
Walmart
West Marine

Product Details

Specifications

Details
Compatible Fuels Gasoline
Product Type Fuel Treatment
Brand Name Star Brite
Container Size 32 oz

Reviews From Real Customers

S.M.D.

6. Start Your Engines 21214 Fuel System Revitalizer, 2 oz

Start Your Engines 21214 Fuel System Revitalizer, 2 oz

  • Additive ensures quick easy starts after extended storage, and ensures smooth idling and performance in season.
  • For all 2 and 4-cycle small engines.
  • Revitalizes fuel and the entire fuel system.
  • Made in the U.S.A.

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Amazon.com
Walmart
Lowe’s
Tractor Supply Company

Product Details

Specifications

Details
Product Type Fuel Treatment
Brand Name Sta-Bil
Container Size 2 oz
Compatible Fuels Gasoline

Reviews From Real Customers

GrandmaT
autozone.com
Stymies

7. Star Brite 14316 Star Tron Enzyme Fuel Treatment – 16 oz.

Star Brite 14316 Star Tron Enzyme Fuel Treatment - 16 oz.

  • 16 oz

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Amazon.com
Walmart
Tractor Supply Company
NAPA Auto Parts

Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Item is Shipped at this Packaging Level N
Packaging Depth 2.25 IN
Packaging Height 8.75 IN
Packaging Width 3.75 IN

Reviews From Real Customers

Joebob
Jasoninct

8. Sea Foam 20 oz Marine Pro Fuel Treatment

Sea Foam 20 oz Marine Pro Fuel Treatment

  • Designed to prevent corrosion from moisture and ethanol induced water attraction
  • Bottle container offers easy portability

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Amazon
eBay
Walmart
West Marine

Product Details

Specifications

Details
Container Type Bottle
Capacity 20 oz
Product Form Liquid
Weight 16 lbs
Recommended Age Group Adult

Reviews From Real Customers

Doghouse
peanutwhistle
Big John The HAWG Napper!

9. Sta-Bil Fuel System Stabilizer – 32 fl oz bottle

Sta-Bil Fuel System Stabilizer - 32 fl oz bottle

  • 32 oz

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Amazon
Home Depot
West Marine
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 3.00 in
Assembled Height (in) 10.00 in
Assembled Width (in) 4.50 in
Assembled Weight (lbs) 1.92 lbs
Item has MSDS (SDS)? Y

Reviews From Real Customers

Be Me
Tractorman92
ValueBuyerCalifornia

10. Sta-Bil 360 Marine Ethanol Treatment – 12 fl oz

Sta-Bil 360 Marine Ethanol Treatment - 12 fl oz

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Amazon
eBay
Great Lakes Skipper

Product Details

Specifications

Details
Assembled Product Weight 0.4 lbs
Assembled Product Dimensions (L x W x H) 3.50 x 2.00 x 8.50 Inches

Reviews From Real Customers

land and sea
LunchBoxSteve
Pflugerjeep

11. Sta-bil Marine Formula Ethanol Treatment – 32 oz bottle

 Sta-bil Marine Formula Ethanol Treatment - 32 oz bottle

  • A new formula designed to prevent corrosion from moisture and ethanol induced water attraction
  • Best ethanol problem fighter with more than four times the fuel system cleaner than regular STA-BIL
  • Contains twice the corrosion preventer than STA-BIL, as well as two non-alcohol water removers
  • Designed for use with every fill up in all 2-4 stroke marine engines running gasoline, gas-oil mixtures, and ethanol blends

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eBay
West Marine
Home Depot

Product Details

Specifications

Details
Brand Name Sta-Bil
Compatible Fuels Diesel/Ethanol/Gasoline
Container Size 32 oz
Product Type Fuel Stabilizer

Reviews From Real Customers

Highmaster2

12. Oregon SF16 Tune Up, Seafoam Motor

Oregon SF16 Tune Up, Seafoam Motor

  • Genuine, OEM Oregon Replacement Part
  • Oregon replacement tune up, part number SF16

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Sold By Price
Amazon
Jacks Small Engines

Product Details

Reviews From Real Customers

jkas5443
raychar8ray
81samsta

13. Mercury Quickare Fuel Treatment 12 oz

Mercury Quickare Fuel Treatment 12 oz

  • 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.

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Amazon
Walmart
Bass Pro Shops
Cabela’s

Product Details

Specifications

Details
Panama City Beach Panama City Beach Florida
Destin Destin Florida
Navarre Navarre Florida

Reviews From Real Customers

Gary v.
softball

14. Gold Eagle 22240 32 oz Marine Formula STA-BIL

Gold Eagle 22240 32 oz Marine Formula STA-BIL

  • More than 4 times the fuel system cleaner than in regular STA-BIL
  • Twice the corrosion preventer than in regular STA-BIL
  • For all 2 cycle and 4 cycle gasoline, diesel engines
  • Improves marine engine performance year- round, not just for seasonal storage

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Amazon
Walmart – Supply the Home

Product Details

Reviews From Real Customers

mrbillbids
jimmyb58951
bijbaddodge

15. Star Tron Enzyme Fuel Treatment 1 oz. 2 Pack

Star Tron Enzyme Fuel Treatment 1 oz. 2 Pack

  • 2 x 1 oz Treats 12 Gallons

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Walmart
J&P Cycles

Product Details

Specifications

Details
Product Dimensions 6.25 x 3.25 x 1 inches
Country of Origin USA
Is Discontinued By Manufacturer No
Exterior Painted

Reviews From Real Customers

J.F.
L.

16. Ethanol Shield Fuel Stabilizer 4 oz.

Ethanol Shield Fuel Stabilizer 4 oz.

  • Provides easy 2 stroke and 4 stroke engine starting all year by keeping Fuel fresh, so there’s no need to buy NEW gas after the winter
  • This proactive/preventive solution addresses performance issues by preventing corrosion and removing water, caused by ethanol fuel
  • Acts as a thermal stabilizer to preserve Fuel from temperature spikes and engine heat
  • Year-round triple antioxidant formula fuel stabilizer eliminates and prevents further ethanol-induced problems
  • Treats up to 40 gallons of Fuel; use 1 oz. per 10 gallons of Fuel

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Valu Home Centers

Product Details

Specifications

Details
Flash Point (F) Greater Than 141 Degrees
Freezing Point (F) -103 Degrees F
Specific Gravity 0.94
For Use With Gasoline
Package Quantity 1

Reviews From Real Customers

kmast1008
cyclecop_9
mmix8462

17. STA-BIL 22208 Fuel STABILIZER, 8 oz

STA-BIL 22208 Fuel STABILIZER, 8 oz

  • Removes water to prevent corrosion and cleans carburetors and fuel injectors
  • Protects engine from gum, varnish, rust, and corrosion
  • Prolongs engine life
  • Eliminates the need to drain fuel before storage, Keeps Petrol Fresh
  • For all 2-cycle and 4-cycle gasoline engines Binding: Automotive

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Walmart
McGuckin Hardware

Product Details

Specifications

Details
Part Type Default
Length 8.600

Reviews From Real Customers

Just Me
Jseuxhsja
Luke

18. Sta-Bil Fuel Stabilizer – 1 gal jug

Sta-Bil Fuel Stabilizer - 1 gal jug

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Home Depot

Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Packaging Depth 7.13 IN
Packaging Height 10.13 IN
Packaging Width 4.44 IN
Package Weight 7.15
Package Weight UOM LB
Net Packaged Quantity 1 GA
Package Size 128 oz
Purpose Prevent gum, varnish and corrosion of fuel
Recommended Application Fuel
Container Type Plastic bottle
Flash Point 185 °F
Amount Of Fuel Treated 320 gal
Oxygen Sensor Safe Yes

Reviews From Real Customers

dddd
Mike1877

19. Lucas Oil 10314 Fuel Stabilizer – 8 oz.

Lucas Oil 10314 Fuel Stabilizer - 8 oz.

  • Best solution to prevent gasoline breakdown during storage.
  • Cleans, lubricates, and maintains fuel pumps, carburetors, fuel injectors and compression rings.
  • Safe to use in all grades of gasoline and in all 2 and 4 cycle engines.
  • Easy to use!

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Details
Weight 0.52 oz

Reviews From Real Customers

als.stgr.22rfoiv
verticalonly
petemasters20102012

20. QuickShot in 8 oz. Bottle (6) Count Pack by AMSOIL | AQSCN-CA

QuickShot in 8 oz. Bottle (6) Count Pack by AMSOIL | AQSCN-CA

  • 8 oz

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AMSOIL

Product Details

Specifications

Details
Is Discontinued By Manufacturer ‎No
OEM Part Number ‎AQSCN CASE

Reviews From Real Customers

CHRIS
CORY

Conclusion

The fuel additive will improve the performance of your 2 stroke outboard by making the engine run more smoothly and efficiently. The fuel additive will also help to protect your engine from wear and tear, and will extend its life.

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