
Sea Foam is a fuel additive that can be used to clean and lubricate your fuel system. It is made from petroleum ingredients and is safe to use in all types of gasoline or diesel fuels and fuel blends. When using Sea Foam, the general rule is that the more you add to your fuel, the better it cleans. For regular fuel system maintenance, it is recommended to add 1 ounce of Sea Foam per gallon of fuel. However, for cleaning, you can add 2 or more ounces per gallon, with some sources recommending using a full 16 oz can of Sea Foam for maximum cleaning. It is also suggested to use Sea Foam every 3,000 miles or every 3 months, depending on your driving habits and engine equipment.
How much Sea Foam should I add to my fuel system?
| Characteristics | Values |
|---|---|
| Regular fuel system maintenance | 1 ounce per gallon |
| Cleaning | 2 or more ounces per gallon |
| Injector cleaning machines | 50/50 mixed with gas |
| Diesel injector cleaning machines | 100% Sea Foam |
| 2-stroke pre-mix | 2 ounces per gallon |
| Stabilizing fuel | 1 ounce per gallon |
| Cars and trucks driven regularly | every 3,000 miles |
| Maximum cleaning | Full 16 oz can of Sea Foam to a low tank (2-3 gallons) |
| Small engines | whenever you refuel |
| Engine equipment used regularly | every 3 months or sooner |
| All other engines and fuel tanks (not used regularly) | every tank of fuel |
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What You'll Learn

Sea Foam is safe for gasoline and diesel engines
Sea Foam Motor Treatment is a petroleum-based formula that is safe and effective for cleaning and maintaining gasoline and diesel engines. It is designed to clean and lubricate critical engine areas, such as fuel injectors and carburetors, removing harmful residues and deposits. This treatment is free of harsh detergents and abrasive chemicals, making it safe for all types of engines, including gasoline and diesel fuel systems.
Sea Foam can be added to the fuel tank, oil crankcase, or intake system, depending on the application and the user's needs. It is compatible with various fuel types, including gasoline, diesel, and blends, as well as different oils like conventional, synthetic, or blends. The product is safe for regular gasoline fuel injection engines and can be used to prime diesel fuel filters during a fuel filter change.
For regular fuel system maintenance, it is recommended to add 1 ounce of Sea Foam per gallon of fuel. However, for cleaning, a higher concentration is often more effective, with 2 ounces or more per gallon being a common starting point. The more Sea Foam added to the fuel, the better the cleaning performance. For maximum cleaning, it is suggested to add a full 16-ounce can of Sea Foam to a low tank (approximately 2-3 gallons) and drive until the tank is almost empty before refuelling.
It is important to follow the recommended dosages and procedures provided by the manufacturer to ensure safe and effective use. Sea Foam Motor Treatment is a versatile and safe product for gasoline and diesel engines, helping to maintain engine performance and resolve common engine problems caused by fuel system issues.
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It can be added to a full or partial tank
Sea Foam can be added to a full or partial tank of fuel. It is an additive that can be put in your fuel tank or crankcase to deal with a wide range of issues. It is made from petroleum ingredients and is safe and effective when used in all types of gasoline or diesel fuels and fuel blends. It does not contain harsh detergents or abrasive chemicals that may harm your engine or fuel system components.
For regular fuel system maintenance, add 1 ounce per gallon. For cleaning, you can add 2 or more ounces per gallon to a low tank. The more Sea Foam you add to the fuel, the better it cleans. You can even add an entire 16 oz can to a low tank (2-3 gallons) and drive until almost empty before refuelling.
If you are experiencing drivability problems caused by residues and deposits (hard starts, stalls, hesitation, loss of power), you can add a full can of Sea Foam Motor Treatment to a partial tank of fuel. 2 oz per gallon is a good starting point for cleaning applications.
Sea Foam can be added to a full tank of fuel if you are using it at the recommended ratio of 1 oz per gallon for maintenance.
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It cleans and lubricates the fuel system
Sea Foam is an additive that can be used to clean and lubricate your fuel system. It is a premium-grade penetrating oil that works hard and lasts long. It is safe to use in any blend of gasoline, diesel fuel, or oil and is compatible with all engine types. Sea Foam is specially formulated to safely and slowly re-liquefy the gum, sludge, varnish, and carbon deposits from the hard parts in your engine so they can be flushed out of the system. It also helps to control small amounts of moisture in the fuel.
Sea Foam can be added directly to your fuel tank or oil crankcase. When added to the fuel tank, Sea Foam will clean and lubricate as the treated fuel is drawn through the fuel system. It works through fuel injectors and carburetors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas. Sea Foam also helps to prevent gum and varnish formation and preserves ignition vapors. For regular fuel system maintenance, it is recommended to add 1 ounce of Sea Foam per gallon of fuel. For a deeper clean, you can add 2 or more ounces of Sea Foam per gallon of fuel.
When added to the oil crankcase, Sea Foam will circulate and clean as the engine runs. It will liquefy heavy oil residues and deposits, improving oil flow. This helps to restore lost engine power and prolong engine life. Sea Foam can also be used to clean engine components by soaking them in a Sea Foam bath. This method is effective for cleaning parts such as carb parts, transmission parts, and hydraulic system parts.
It is important to note that Sea Foam should not be used as a substitute for regular maintenance and fuel system cleaning. It is recommended to add Sea Foam to your fuel or oil every 2,000 to 5,000 miles or every 3,000 miles for cars and trucks driven regularly. For small engines, Sea Foam can be added whenever you refuel. By following these recommendations, you can keep your fuel system clean and lubricated, maintaining the efficiency and performance of your engine.
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The more Sea Foam added, the better it cleans
Sea Foam is a highly effective fuel additive that can be used to clean and lubricate your entire fuel system. It is designed to work through fuel injectors and carburetors, removing harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas.
The amount of Sea Foam you add to your fuel system depends on your desired level of cleaning. For regular fuel system maintenance, it is recommended to add 1 ounce per gallon of fuel. However, if you are looking for a more intensive clean, you can add 2 or more ounces of Sea Foam per gallon of fuel. The key principle to remember is that the more Sea Foam you add, the better it cleans.
For maximum cleaning power, it is suggested to add an entire 16-ounce can of Sea Foam to a low fuel tank (approximately 2-3 gallons) and then drive until the tank is almost empty before refueling. This method ensures that the Sea Foam has sufficient concentration and time to thoroughly clean your fuel system.
Additionally, Sea Foam can be used in various engines and fuel tanks, including those not used regularly. For these applications, it is recommended to add Sea Foam to every tank of fuel. It is also worth noting that Sea Foam is safe for all types of gasoline, diesel fuels, and fuel blends. It does not contain harsh detergents or abrasive chemicals that could potentially harm your engine or fuel system components.
In summary, the amount of Sea Foam you add to your fuel system is directly proportional to its cleaning effectiveness. Whether you are performing regular maintenance or seeking a deeper clean, Sea Foam provides a safe and reliable solution to keep your fuel system in optimal condition.
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Sea Foam is safe to use often
Sea Foam is a petroleum-based product that is safe to use often in all types of gasoline or diesel fuels and fuel blends. It does not contain harsh detergents or abrasive chemicals that can harm your engine or fuel system components. It is compatible with most gas and diesel engine cars, including gasoline and diesel engines, as long as it is used according to the manufacturer's instructions.
For regular fuel system maintenance, add 1 ounce of Sea Foam per gallon of fuel. For cleaning, you can add 2 or more ounces of Sea Foam per gallon of fuel. The more Sea Foam you add to the fuel, the better it cleans. For maximum cleaning, add a full 16 oz can of Sea Foam to a low tank (1/4 to 1/8 tank) and drive for at least 10-20 miles before refueling.
Sea Foam can also be added to the oil crankcase. Add 1 ounce of Sea Foam per quart of oil in the crankcase. The best time to add Sea Foam is 100-300 miles before your next oil change. This gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil.
Sea Foam is a safe and effective way to maintain your engine's performance and keep your fuel system clean and lubricated. It is important to follow the recommended dosages and procedures to avoid potential issues.
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Frequently asked questions
For regular fuel system maintenance, add 1 ounce of Sea Foam per gallon of fuel.
For cleaning, add 2 or more ounces of Sea Foam per gallon of fuel. The more Sea Foam you add to fuel, the better it cleans.
For cars and trucks driven regularly, add Sea Foam to your fuel every 3,000 miles or every three months. For small engines, add Sea Foam whenever you refuel. For engine equipment used regularly, add Sea Foam to a fresh tank fill every three months or sooner. For all other engines and fuel tanks that are not used regularly, add Sea Foam to every tank of fuel.
Yes, it is safe to add Sea Foam to your fuel system. Sea Foam is made from petroleum ingredients and does not contain harsh detergent or abrasive chemicals that can harm your engine or fuel system components.











































