Letter from Sea Foam

[Daytona]

I sent the makers of Sea Foam a question about whether or not their product thins out the oil forcing an oil change. This is their reply:

Sir,

Sea Foam used (as directed) in crankcase oil dries moisture and re-liquefies old oil residue. Sea Foam can be used as a pre service cleaner and as an after service additive with no affect on plastics, composites, aluminum, steel, gaskets, seals, or any other manufacturer supplied component.

See the attachment to this e-mail

You can NOT run any engine crankcase on pure Sea Foam, even though Sea Foam is 100% petroleum blended oil. A premium QUALITY oil, Sea Foam was not engineered to supply the film strength of a (made for) crankcase-use oil, like Mobil 1 synthetic or your basic Valvoline, Havoline or Pennzoil does.

When Sea Foam is applied to crankcase oil at 1 1/2 ounces Sea Foam per quart of crankcase oil (see product container), Sea Foam DOES NOT affect the viscosity or lubricating properties of that crankcase oil to which it is applied, including synthetics and blends.

Please see the attached reference sheet on using Sea Foam in Oil.

Thank You

rooster Davis
Technical Services Manager
Sea Foam Sales Company
Minneapolis, Minnesota


They also attached the following info as a Word Document to the email:

Sea Foam Motor Treatment used in Crankcase oil

All Gasoline and Diesel, Rotary style engines

Sea Foam may be used in an oil crankcase 2 separate ways, depending on your needs and expectations.

Sea Foam is most commonly used as a pre service old oil residue cleaner and moisture drier, and is also used as an after service additive.

1. As a pre service cleaner for residue, sticky rings or valve train noise, put 1 ½ ounces of Sea Foam Motor Treatment into the engine oil crankcase for EACH quart of oil capacity including filter. Drive a MINIMUM of 30 minutes/miles, MAXIMUM 100 miles, then do your oil change service (LOF). This begins the process of safely/slowly re liquefying the old oil residue so contaminants may flow and be filtered. This also makes your old oil dirtier, quickly, so a LOF service is necessary when the oil gets dirty.

2. As an after service additive into fresh oil, nearly fresh oil, or oil (used condition) that is NOT ready to be changed (by mileage), put the same amount as above, then SELF SET a program to MONITOR your oil for color and clarity on a mileage, timed, or event basis (like every time you add fuel, etc.) to determine when an oil service is necessary.

Sea Foam will safely and slowly re liquefy old oil residue, so it will probably make your oil need changing BEFORE your normal scheduled LOF service. Only your monitoring of the oil for color and clarity can tell when it is time to do oil service, or 3,000 miles, whichever comes first.

Check your oil level and monitor the color for needed service!

Change your oil when it gets dirty!