How many millilitres of Sea Foam per litre of fuel [SOLVED]

Do you have a millilitres to litres ratio for Sea Foam ?

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Jim D.
1 year ago

Hey David,

Here’s our recommendation for Sea Foam in fuel, in ml and litres:

For routine/preventative maintenance:

Add 10 ml per litre of fuel. One can treats up to 47
litres. One gallon treats up to 378 litres. Just pour directly into the tank.

For cleaning: 

Add at least 20 ml per litre of fuel.

When cleaning a gasoline or diesel fuel system, it’s safe to add more Sea Foam to fuel. In fact,
the more Sea Foam you add to fuel, the greater the cleaning concentration. For best results, add a full can of Sea Foam to a low tank of fuel (1/8 tank or so), and drive at least 30 km before refueling.


Sea Foam Motor Treatment only contains petroleum-based ingredients and is always safe
to use in all types of gasoline and diesel engines. It does NOT contain harsh detergent or
abrasive chemicals.

9 months ago

I have a diesel ride on mower, it holds about 30L of fuel. It has been sat over the winter with a partially full tank. I topped it up to give it its first use of the year and noticed it surging like it was being starved of fuel. I changed the fuel filter as it had sediment it. How much Sea Foam do I need to put in to treat the fuel and how long do I need to run the engine for?