Motor Treatment
Technical Information
Gas Engines
E-85 Fuels and Sea Foam
Sea Foam Motor Treatment is a unique 100% pure petroleum oil product, developed to solve specific problems that are common to gasoline, gas/oil mixed fuels & diesel fuels used in all types and styles of 2 cycle, 4 cycle, diesel and Rotary (Wankel type) engines in common use in all automotive, truck, fleet, industrial, agricultural, specialty industries and small engine applications.
When Sea Foam Motor Treatment is added at 1 ounce per gallon to commonly available 10% & 15 % blended Ethanol fuels as recommended, Sea Foam:
- Adds lubrication for upper cylinders and vital fuel system components
- Dries moisture and works as an anti-gel
- Cleans fuel system residue
- Stabilizes fuel for up to 2 years or more
- Cleans carbon deposits from pistons, heads & valves as the engine is run
Sea Foam has been used in Ethanol fuels (10%, 15% and most recently E-85) successfully since their initial introduction into the marketplace during the 1990’s. As these “New” Ethanol fuels become more widely available nationwide, questions have arisen about the use of Sea Foam Motor Treatment in Ethanol fuels.
Sea Foam Motor Treatment has been performing its engine component cleaning function in gasoline and diesel engines since 1940, and now it performs this same function just as well in Ethanol-blended fuels. An average one ounce Sea Foam per gallon of Fuel is recommended in both gasoline and in 10% & 15% Ethanol blends.
Ethanol fuels differ from standard gasoline in a few aspects, presenting potential issues that can be addressed through the use of Sea Foam Motor Treatment.
- Ethanol tends to strip engine oil from cylinder walls and can be harsh on exposed surfaces & components that require lubrication. Sea Foam is oil, adding lubrication to upper cylinders that will prolong the life of your engine.
- Ethanol absorbs moisture which needs to be removed from the Ethanol. Sea Foam dries moisture from fuel.
- Ethanol leaves deposits which periodically need to be cleaned. Sea Foam is a fuel residue and carbon cleaner.
- Ethanol deteriorates as fast as non-ethanol fuel, the need to stabilize remains. Sea Foam is the best fuel stabilizer around.
- Ethanol burns faster, hotter, & makes about 18% less power than gasoline – characteristics that make it less desireable. This tendency to burn faster and hotter increases the risk of damage from pre-ignition and detonation – especially in engines with carbon build-up in their cylinders. Adding Sea Foam slows down the burn rate of Ethanol to levels resembling standard gasoline.
Sea Foam recommends 2 ounces of Sea Foam per gallon of E-85 blended fuel for moisture control and added lubrication because of E-85’s MINIMUM 70% ethanol content. (Minnesota labels E-85 as MINIMUM 70% Ethanol content or more)
THE USE OF SEA FOAM MOTOR TREATMENT IN E-85 FUELSTechnical Services Department – Sea Foam Sales Company
Sea Foam Motor Treatment is a unique 100% pure petroleum oil product that solves specific concerns in engines that use E-85 fuels. Sea Foam recommends adding 2 ounces of Sea Foam Motor Treatment per gallon of E-85 blended fuels for the best results. Always follow instructions for all applications - Use in Fuels, Use by Induction (Air Intake, Main Manifold Vacuum line serving all cylinders or Direct Induction Systems).
- Cleans fuel injectors – Add to Fuel or Use Direct Induction System. E-85 leaves deposits on injectors, which periodically needs to be cleaned.
- Cleans carbon - Add to Fuel or Use by Direct Induction Systems. E-85 leaves carbon deposits the same as non-ethanol fuels and must be cleaned.
- Cleans carburetor jets–Add to Fuel. E-85 leaves residue in carburetors that must be cleaned.
- Helps prevent corrosion issues common to E-85 fuels and removes moisture - Add to Fuel. E-85 is corrosive and draws moisture that must be removed.
- Adds lubricity – Add to Fuel. E-85 fuel lacks lubrication and is harsh on engine parts. The use of Sea Foam Motor Treatment gives the lubricity needed for less wear on engines.
- Stabilizes fuels – Add to Fuel. E-85 becomes stale within 30 days and must be stabilized. Sea Foam Motor Treatment stabilizes fuels for 2 years.
- Upper cylinder lubrication–Add to Fuel. E-85 is harsh on engine parts and the use of Sea Foam Motor Treatment gives the lubrication needed for less wear on engine parts.
- Cleans catalytic converter odors – Add to Fuel. The use of Sea Foam Motor Treatment helps remove converter odors.
- Cleans P.C.V. systems – Add to Fuel. The use of Sea Foam Motor Treatment helps keep P.C.V. Systems clean.

