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Celebrating over 50 years of Trusted Marine Service
Over 50 years of Trusted Marine Service

Fuel Additives

Marine Fuel Additives & Treatments

Protect your engine and fuel system with quality marine fuel additives designed to combat ethanol-related issues, prevent corrosion, and maintain peak engine performance.

Fuel Stabilizers

  • Ethanol fuel stabilizers
  • Long-term storage treatments
  • Seasonal fuel protection
  • Prevents fuel degradation and varnish buildup

Fuel System Cleaners

  • Injector and carburetor cleaners
  • Carbon deposit removers
  • Fuel system flush treatments
  • Complete fuel system cleaners

Water Removers & Conditioners

  • Fuel/water emulsifiers
  • Moisture control additives
  • Fuel conditioners
  • Anti-gel diesel treatments

Performance Additives

  • Octane boosters
  • Cetane improvers for diesel
  • Fuel economy enhancers
  • Anti-knock additives

Regular use of quality fuel additives helps prevent costly repairs by protecting against ethanol damage, water contamination, and fuel system deposits. Choose from trusted marine brands formulated specifically for marine engines.

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Star*Tron® Tank Cleaner, 1/2 Gal.

Star*Tron® Tank Cleaner, 1/2 Gal.

$71.79 - $71.79
$71.79
$71.79 - $71.79
$71.79
Item locally warehoused

Star*Tron® Tank Cleaner is a concentrated gasoline and diesel fuel tank cleaner made for tanks with extremely heavy sludge and related deposits—use...

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$71.79 - $71.79
$71.79
$71.79 - $71.79
$71.79
Gas Stabilizer 5 Gal.

Gas Stabilizer 5 Gal.

$733.19 - $733.19
$733.19
$733.19 - $733.19
$733.19
Item locally warehoused

Star Brite Gas Stabilizer helps protect gasoline engines and fuel systems during storage by stabilizing fuel and helping prevent corrosion. Key Fea...

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$733.19 - $733.19
$733.19
$733.19 - $733.19
$733.19
Gas Stabilizer 1 Gal.

Gas Stabilizer 1 Gal.

$161.99 - $161.99
$161.99
$161.99 - $161.99
$161.99
Item locally warehoused

Star brite Gas Stabilizer helps protect gasoline engines and fuel systems during storage—so you can keep your equipment ready to fire when the seas...

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$161.99 - $161.99
$161.99
$161.99 - $161.99
$161.99
Starbrite 93005 Star Tron Gas Additive, 5 Gallon

Starbrite 93005 Star Tron Gas Additive, 5 Gallon

$1,264.69 - $1,264.69
$1,264.69
$1,264.69 - $1,264.69
$1,264.69
Item locally warehoused

Cures & prevents ethanol fuel problems.Makes any engine run more smoothly, start more easily. Eliminates & prevents gum, varnish and carbon...

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$1,264.69 - $1,264.69
$1,264.69
$1,264.69 - $1,264.69
$1,264.69
Starbrite 93637 Star Tron® Gas Additive Small Floor Marine Display

Starbrite 93637 Star Tron® Gas Additive Small Floor Marine Display

$1,087.99 - $1,087.99
$1,087.99
$1,087.99 - $1,087.99
$1,087.99
Item locally warehoused

StarTron Gas Additive small floor display24 ea. 93008-8 oz.12 ea. 93016-16 oz.1 oz. Treats 16 gallons of gasoline. Overdosing is not harmful.

$1,087.99 - $1,087.99
$1,087.99
$1,087.99 - $1,087.99
$1,087.99
Starbrite 93625 Star Tron® Gas Additive Countertop Marine Display

Starbrite 93625 Star Tron® Gas Additive Countertop Marine Display

$590.69 - $590.69
$590.69
$590.69 - $590.69
$590.69
Item locally warehoused

StarTron Gas Additive Countertop Marine Display is a ready-to-sell small countertop display made for treating gasoline between top-ups. Each displa...

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$590.69 - $590.69
$590.69
$590.69 - $590.69
$590.69
Starbrite 93105 Star Tron Diesel Additive, 5 Gallon

Starbrite 93105 Star Tron Diesel Additive, 5 Gallon

$1,696.69 - $1,696.69
$1,696.69
$1,696.69 - $1,696.69
$1,696.69
Item locally warehoused

Starbrite Star Tron Diesel Additive (93105) is a concentrated diesel enzyme treatment designed to help engines start more easily, run more smoothly...

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$1,696.69 - $1,696.69
$1,696.69
$1,696.69 - $1,696.69
$1,696.69
Starbrite 93100 Star Tron Diesel Additive, Gallon

Starbrite 93100 Star Tron Diesel Additive, Gallon

$354.39 - $354.39
$354.39
$354.39 - $354.39
$354.39
Item locally warehoused

Star brite Star Tron Diesel Additive (93100) is a concentrated diesel fuel treatment formulated to help engines start more easily and run more smoo...

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$354.39 - $354.39
$354.39
$354.39 - $354.39
$354.39
Sierra Gasoline Fuel Tester

Sierra Gasoline Fuel Tester

$20.69 - $20.69
$20.69
$20.69 - $20.69
$20.69
Item locally warehoused

The Sierra Gasoline Fuel Tester is a practical diagnostic tool for checking fuel quality by measuring alcohol (ethanol) content. Key Features Test...

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$20.69 - $20.69
$20.69
$20.69 - $20.69
$20.69

ComStar Hum-Out Diesel Fuel Biocide 16 oz

$42.45 - $42.45
$42.45
$42.45 - $42.45
$42.45
118 in stock

ComStar Hum-Out Diesel Fuel Biocide — 16 ozDiesel fuel tanks on boats are a prime environment for microbial growth. Bacteria, algae, and fungi thri...

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$42.45 - $42.45
$42.45
$42.45 - $42.45
$42.45

Mercury / MerCruiser Quicksilver Engine Cleaner — 858080KC3

$12.34 - $12.34
$12.34
$12.34 - $12.34
$12.34
Only 4 left!

Mercury / MerCruiser Quicksilver Engine Cleaner — 858080KC3 The Mercury Quicksilver 858080KC3 Engine Cleaner (commonly listed as 858080K03 / 92-85...

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$12.34 - $12.34
$12.34
$12.34 - $12.34
$12.34

Methyl Hydrate 946ml - Marine Fuel Line Antifreeze & Gas Dryer

$14.13 - $14.13
$14.13
$14.13 - $14.13
$14.13
946.0ml | $14.94 / l
65 in stock

Premium methyl hydrate (methanol) formulated for marine fuel system maintenance and winterization. This 946ml bottle provides essential protection ...

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$14.13 - $14.13
$14.13
$14.13 - $14.13
$14.13
946.0ml | $14.94 / l

Diesel Cetane Boost - Premium Fuel Additive for Marine Diesel Engines

$14.20 - $14.20
$14.20
$14.20 - $14.20
$14.20
7 in stock

Premium Diesel Cetane Booster for Marine EnginesEnhance your marine diesel engine's performance with our premium cetane booster fuel additive. Form...

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$14.20 - $14.20
$14.20
$14.20 - $14.20
$14.20