
Sea Foam is a petroleum-based product used to stabilize fuel and clean engines. It can be used in all types of gasoline or diesel engines and is safe and effective. When used as a fuel stabilizer, Sea Foam helps stored fuel resist evaporation, preserves ignition vapors, and prevents the formation of gum and varnish in fuel systems. For preventative maintenance and fuel storage, it is recommended to add 1 ounce of Sea Foam per gallon of fuel. However, for maximum cleaning, a higher concentration of Sea Foam can be added to a low tank of fuel, typically a 1:2 ratio of Sea Foam to fuel. Sea Foam can also be added to gasoline that already has a fuel stabilizer such as Sta-Bil, providing an additional layer of protection and cleaning.
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What You'll Learn

Sea Foam stabilizes fuel for up to 2 years
Sea Foam is a fuel additive that helps to stabilize fuel for up to 2 years. It is made from petroleum ingredients and is safe and effective when used in all types of gasoline, diesel fuels, and fuel blends. Sea Foam does not contain harsh detergents or abrasive chemicals that can harm your engine or fuel system components.
When used as a fuel stabilizer, Sea Foam is added to fuel at a rate of 1 ounce per gallon of fuel. It is recommended to add Sea Foam to stored fuel tanks to help the fuel resist evaporation, preserve ignition vapors, and prevent the formation of gum and varnish in the fuel system. Gum and varnish residues are a common cause of poor engine performance and can lead to hard starts and rough engine operation.
In addition to stabilizing fuel, Sea Foam can also be used to clean the fuel system and overcome fuel-related engine problems. For this application, a higher concentration of Sea Foam is used, typically 2 or more ounces per gallon of fuel. To maximize cleaning, a full can of Sea Foam (16 ounces) can be added to a low fuel tank (2-3 gallons) and the vehicle can be driven until the tank is almost empty before refueling.
Sea Foam is also safe to use in engines that already have other fuel additives or stabilizers, such as Sta-Bil. It can be added to gasoline or diesel engines and is compatible with modern engines that are designed to handle ethanol. Sea Foam helps to protect against the harmful effects of ethanol and water, but it is important to note that it does not completely counter the negative effects of ethanol left in a tank for an extended period.
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It helps fuel resist evaporation
Sea Foam Motor Treatment is a fuel additive that helps stabilize stored fuel for up to two years. It helps fuel resist evaporation, preserves ignition vapors, and prevents the formation of gum and varnish residues in fuel systems, which are common causes of poor engine performance.
Sea Foam is made from petroleum-based ingredients and is safe and effective for use in all types of gasoline, diesel fuels, and fuel blends. It does not contain harsh detergents or abrasive chemicals that can harm your engine or fuel system components. When used as a fuel stabilizer, Sea Foam adds protective lubricity to the fuel and fuel system parts. This helps to protect against water and ethanol, although it is important to note that fuel additives may not completely counter the harmful effects of ethanol left in the tank for extended periods.
To stabilize fuel, it is recommended to add one ounce of Sea Foam per gallon of fuel. This can be done for every tank of stored fuel or for fuel system maintenance at a rate of 10 ml per liter of fuel. For engines and fuel tanks that are not used regularly, it is advised to add Sea Foam to every tank of fuel.
For those seeking to clean their fuel system or address fuel-related engine problems, a higher concentration of Sea Foam can be added. It is suggested to use two or more ounces of Sea Foam per gallon of fuel for maximum cleaning. This process can be repeated every 3,000 miles or 5,000 kilometers for cars and trucks driven regularly.
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Sea Foam cleans gum and varnish from the fuel system
Sea Foam is an effective cleaner for fuel systems. It is made from petroleum ingredients and is safe to use in all types of gasoline, diesel fuels, and fuel blends. Notably, Sea Foam does not contain harsh detergents or abrasive chemicals that could harm your engine or fuel system components.
Sea Foam is particularly useful for cleaning gum and varnish from the fuel system. Gum and varnish residues are a common cause of poor engine function, leading to issues such as rough performance and hard starts. By removing these residues, Sea Foam helps engines start more easily and last longer.
To clean gum and varnish from your fuel system, it is recommended to add a high concentration of Sea Foam to a low tank of fuel. Specifically, a 1:2 ratio of Sea Foam to fuel is suggested. After adding Sea Foam, run the engine for about ten minutes, shut it off, and let it soak overnight. The next day, start the engine again and run it for an extended period. This process will ensure that the Sea Foam has thoroughly cleaned the fuel system.
Additionally, Sea Foam can be used to prevent gum and varnish build-up in fuel systems. When used as a preventative measure, it is recommended to add one ounce of Sea Foam per gallon of fuel. By regularly using Sea Foam, you can maintain a clean and efficient fuel system, preventing future issues caused by gum and varnish accumulation.
Overall, Sea Foam is a reliable and safe solution for cleaning and maintaining fuel systems. Its ability to remove gum and varnish deposits makes it a valuable tool for improving engine performance and longevity.
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It can be used in addition to other fuel additives
Sea Foam is a fuel additive that can be used in addition to other fuel additives. It is safe to use in all types of gasoline or diesel fuels and fuel blends. Sea Foam does not contain harsh detergents or abrasive chemicals that could harm your engine or fuel system components. It can be used to stabilize fuel for up to two years, and it helps prevent the formation of gum and varnish in fuel systems.
When used in addition to other fuel additives, Sea Foam can provide extra protection and cleaning benefits. For example, if you are already using a fuel stabilizer like Sta-Bil, adding Sea Foam can help clean and prevent residue build-up caused by ethanol in small engines. This can improve engine performance and make it easier to start.
Sea Foam can also be used in addition to other fuel additives for diesel engines. For example, when priming diesel fuel filters or using diesel injector cleaning machines, you can use 100% Sea Foam. This will help clean and lubricate the fuel system, removing harmful residues and deposits.
It's important to note that while Sea Foam can protect against ethanol and water, it may not completely counter the harmful effects of ethanol left in a tank for a long period. Additionally, some users have reported that Sea Foam is more effective for cleaning than for storage, and they prefer to use other products like Sta-Bil or TruFuel for long-term fuel storage.
When using Sea Foam in addition to other fuel additives, it is essential to follow the recommended ratios and instructions for both products to ensure safety and effectiveness. It is generally safe to add a high concentration of Sea Foam, and the more you add, the better it cleans. However, always refer to the product instructions and seek advice from a qualified technician if needed.
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Sea Foam can be used for diesel injector cleaning
Sea Foam is a fuel and oil additive manufacturer that offers products for critical engine areas, including fuel injector cleaning. The Sea Foam IC5 Fuel Injector Cleaner is specifically designed to clean fuel injectors and restore injector spray patterns for improved engine performance.
To use Sea Foam for diesel injector cleaning, it is recommended to use 100% Sea Foam in diesel injector cleaning machines or when priming diesel fuel filters. This means that for a diesel injector cleaning machine, you would fill the machine's reservoir with Sea Foam and follow the machine's instructions for cleaning your diesel injectors. When priming diesel fuel filters, you would pour the Sea Foam directly into the fuel filter.
For cleaning a diesel fuel system, it is safe to add Sea Foam to your fuel tank. The recommended amount is 1 ounce per gallon of fuel. However, for maximum cleaning, you can add a full 16 oz can of Sea Foam to a low tank (2-3 gallons) and drive until almost empty before refuelling. This creates a high concentration of Sea Foam, allowing it to effectively clean your diesel injectors.
Sea Foam can also be added to the oil crankcase. Add 1 ounce of Sea Foam per quart of oil, and it is recommended to do this 100-300 miles before your next oil change. This gives the Sea Foam enough time to circulate and clean, ensuring that any reliquefied oil residues are drained away with the old oil.
By following these instructions, Sea Foam can be effectively used for diesel injector cleaning, improving engine performance and maintaining the health of your diesel fuel system.
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Frequently asked questions
For preventative maintenance/fuel storage, add 1 ounce of Sea Foam per gallon of fuel.
For cars and trucks, add 1-2 cans of Sea Foam to your fuel tank every 3,000 miles or 5,000 kilometers.
Sea Foam works by adding protective lubricity to fuel and fuel system parts. It helps stored fuel resist evaporation, preserves ignition vapors, and prevents the formation of gum and varnish in fuel systems.
Yes, Sea Foam can be used to clean your engine. For maximum cleaning, add a full 16 oz can of Sea Foam to a low tank (2-3 gallons) and drive until almost empty before refueling.
Yes, it is safe and effective to add Sea Foam to gasoline that already has Sta-Bil or another additive/stabilizer in it.










































