The 6 Best Boat Fuel Tank
Cleaning Products

Paul Luisi
by Paul

Cleaning a boat fuel tank requires using special marine fuel tank cleaners to help avoid damaging the engine.

These products remove dirt, sludge and other harmful substances from your fuel tank.

The top boat fuel tank cleaning products are:

  1. Star Tron Gas Tank & Fuel System Cleaner
  2. STA-BIL 360 Marine Ethanol Treatment & Fuel Stabilizer
  3. Star Tron Enzyme Fuel Treatment Concentrate
  4. Sea Foam SF-16 Motor Treatment
  5. Lucas Oil Fuel Treatment Cleaner
  6. Por 15 Fuel Cleaning & Repair Kit

These cleaning products are some of the best for cleaning a dirty boat fuel tank.

Best Overall Boat Fuel Tank Cleaner

The top overall marine fuel tank cleaning product is Star Tron Gas Tank & Fuel System Cleaner.

This cleaner is the best all round marine fuel tank cleaning product.

Star Tron Fuel Tank Cleaner

star tron fuel tank cleaner

This is a great cleaning product for many marine motors.

The benefits of the Star Tron Fuel Tank Cleaner are:

  • Removes sludge from the fuel tank: The cleaning agent helps remove dirt and sludge build up on the fuel tank walls.
  • Prevents fuel contamination: This cleaner helps remove and prevent further fuel contaminants from the boat tank.
  • Works in both gasoline and diesel engines: This cleaning formula can be used in both gasoline and diesel boat fuel tanks.
  • Clears clogged up fuel lines: The concentrated formula helps to unclog fuel lines and fuel injectors.
  • Great value for money: 1 container treats up to 250 gallon tank.

This product will work after sitting in the fuel tank for 24 hours. You can check current price on Amazon.

The Star Tron Fuel Tank Cleaner is a great concentrated cleaning product for removing sludge and dirt from the fuel tank. We rate this as best overall cleaner.

Best Cleaner For Corrosion Prevention

The best fuel tank cleaner for helping prevent corrosion is the STA-BIL 360 Marine Ethanol Treatment and Fuel Stabilizer.

STA-BIL 360 Marine

Sta-Bil 360 Marine

This cleaning agent is specifically formulated for marine engines and fuel tanks. It can be used in most boat motors.

The benefits of STA-BIL 360 Marine are:

  • Stabilizes Fuel For 1 Year:  This cleaning product will help stabilize the fuel and keep it fresh for up to 1 year.
  • Cleans Out Fuel System: This cleaner will erode dirt, varnish, gum and sludge build up. This will help free up the fuel lines and fuel systems.
  • Increases Fuel Efficiency: Removing dirt and sludge means the overall fuel efficiency for the boat is much better.
  • Helps prevent corrosion of fuel lines and walls: The salt water removal properties in the cleaning formula help prevent corrosion.

1 oz. of this product treats 10 gallons of fuel. For the best results, wait between 24 - 48 hours.

You can check price on Amazon.

The STA-BIL 360 Marine Ethanol Treatment is a great product for preventing corrosion in the fuel tank and fuel systems.

Best Cleaner For Treating Fuel

The Star Tron Enzyme Fuel Treatment Concentrate is the best fuel treatment for boat fuel tank.

Star Tron Enzyme Fuel Treatment

star tron fuel treatment

This cleaning agent is great value for money. 1 container can treat 128 gallons of fuel.

The benefits of Star Tron Enzyme Fuel Treatment are:

  • Removes gum, carbon and varnish: This cleaning product will remove old dirt and sludge from the fuel tank.
  • Helps with fuel efficiency and performance: Clearing clogged and dirty fuel tanks improves the overall engine health and performance.
  • Stabilizes fuel for 2 years: This cleaner will provide protection to the fuel and fuel tank for up to 2 years.
  • Prevents ethanol problems: The special concentrated treatment helps prevent common ethanol problems with old fuels and dirty fuel tanks.

You can check price on Amazon.

The Star Tron Enzyme Fuel Treatment will treat and clean most marine fuel tanks and fuel systems.

Best Cleaner For Price

The best fuel tank cleaner for price is the Sea Foam SF-16. This product is great value for money.

Sea Foam SF-16 Motor Treatment

sea foam tank cleaner

The Sea Foam SF-16 is the best boat fuel tank cleaning product for price.

The benefits include:

  • Stabilizes the fuel for 2 years: It will keep the fuel stabilized for up to 2 years.
  • Cleans Fuel Tank & Injectors:  This cleaning agent will clear out dirt from the fuel tank and injectors.
  • Easy to use: Simply add it to a vessels gas or diesel fuel and let it work.
  • Prevents gum and varnish formation: The cleaning agent will help prevent dirt forming with it's formula designed to stop build up.

The sea form cleaner will remove the toughest dirt from the fuel tank.

It's the best cleaner for the price on the list.

The Sea Foam SF-16 Treatment is the best value for money boat fuel tank cleaner. It will remove dirt, mold and clean out entire fuel system.

Best Cleaner For Increasing MPG

The top fuel tank cleaner that can be used in marine engines for increasing miles per gallon (mpg) is Lucas Oil Fuel Treatment.

Boaters looking to increase the fuel efficiency of their boat engines should try this product.

Make sure it is compatible for your specific motor fuel tank.

Lucas Oil Fuel Treatment

lucas fuel cleaner product

The Lucas complete fuel tank cleaner is a great product for all round injector and tank cleaning.

The benefits of Lucas Oil Fuel Treatment are:

  • Increase MPG in engine: This cleaner cleans and removes sludge and dirt build up. This means a smoother and more efficient running of the engine which helps increase mpg.
  • Fixes low quality fuels: This will help fix dirt and sludge in the fuel itself making everything run better.
  • Cleans and lubricates entire fuel system: This cleaner will tackle dirt build up in the tank, injectors and fuel lines.
  • Increases fuel tank & pumps life: The special formula helps protect the fuel tank and fuel pumps life.
  • Helps fix low sulphur diesel problems: The cleaning agent acts to minimize the harmful effects of low sulfur diesel fuel.
  • Great value for money: The 1 gallon container can treat up to 400 gallons of gasoline and diesel fuel.

You can check current price for this product on Amazon.

The Lucas Oil Fuel Tank Cleaner will help remove dirt build up and improve overall engine health. It will also help improve fuel consumption and efficiency.

Best Boat Fuel Tank Cleaning Kit

The best boat fuel tank cleaning kit is the POR 15 kit. This kit comes with a metal prep, fuel tank sealer and cleaner degreaser.

POR 15 Fuel Tank Cleaning & Repair Kit

POR 15 Tank Cleaning Kit

This kit is great for cleaning and repairing damaged fuel tanks.

The benefits of using the POR 15 Cleaning Kit are:

  • Rust prevention: The coating in the product helps protect from future rusting of the fuel tank walls and lines.
  • Removes dirt, grease and sludge: This cleaning kit will flush out dirt build up in the marine fuel tank.
  • Industrial strength degreaser: The formula used is extra strong and helps tackle the toughest dirt.
  • Resistant to all fuels: This means it can be used in most boat engines.

Just look at the image above to see the obvious difference a cleaner fuel tank will have on the fuels versus a dirty one.

Check the current price on Amazon.

POR 15 cleaning and repair kit will help give the boat fuel tank a complete overhaul. It will remove dirt, repair rusty fuel walls and clean the fuel system.

Top Boat Cleaners Summary

These marine cleaning products will remove dirt, grease and mold from a boat's fuel tank.

The boat fuel tank cleaners can be used in both outboard and inboard boat motors.

Ensure the fuel treatments are compatible with your boat's fuel before purchasing.

These products should start to show results after 24 - 48 hours of using them.