Ethanol is an alcohol made from corn or grains and it is added to gasoline to oxygenate fuel.

Several marine engine manufacturers and marine associations have issued ethanol warnings, which state that using over 10% ethanol fuel will damage your engine and potentially invalidate your warranty.

  • E10 Gasoline contains 10% Ethanol and E85 contains 85% Ethanol.
  • Ethanol alcohol evaporates from your fuel reducing oxygen levels quickly.
  • Ethanol alcohol fuel blends expire in 90 days.
  • Ethanol is Hygroscopic (will absorb water) so when exposed to excessive water, Ethanol Fuels will expire much faster.

For this reason, the ethanol is added to the fuel at the pumps not prior.

Studies report that after 100 days, alcohol fuel absorbs enough moisture to phase separate. E10 only requires 0.5% (3.8 teaspoons per gallon) to phase separate.

Phase Separation reduces gasoline’s octane levels by as much as 3 points, greatly reducing power requiring more fuel for the job.

That is not the worst part though, when Ethanol Fuel phase separates the solvents drop out of suspension forming a thick solvent gel on the bottom of your tank. When mixed with tiny dust particles in your fuel tank that solvent gel becomes abrasive so you have a Strong Solvent with abrasive characteristics causing even more damage to your internal engine components and fuel delivery system.

Lastly Phase Separation creates the perfect environment for fuel bugs to thrive at the water and hydrocarbon interface. FCC’s ability to remove water and eliminate the phase separation issue is a big reason why it should be added to bulk fuel tanks as well as tanks that are standing for periods of time. FCC Fuel conditioner will preserve Ethanol fuels storage life.

Ethanol is an excellent solvent that dissolves fuel system components. Ethanol can dissolve rubbers, plastics, some fiberglass’s and even aluminium. The rubber that is used in fuel system parts like seals and hoses may shrink, lose strength and become brittle.

E10 and E85 fuel generates less energy. E85 only generates about 75% of the power generated by gasoline. This results in poor gas mileage.

Some profit driven fuel suppliers increase the dose of ethanol because it is cheaper than petroleum.

Boat owners are especially susceptible to these issues because they operate in a water environment. They also store their fuel for longer periods without use and tend to have fewer seals on their fuel caps than cars do. Boat engines are also used in the warmer more humid and moist months of the year.