Posted 3/31/2019 5:00 AM (#934187 - in reply to #931126) Subject: Re: Gas
E10 fuels are fine. The problem is phase separation. It is why marine engines have water separation fuel filters. You dont see these on cars. The marine environment promotes water contamination in fuel tanks. Constant temp changes and wet environments cause condensation. .5% water will cause phase separation at 60 degrees. This number drops when it gets colder. Most fuel contains some water and it varies. It may not take much in a marine environment to get to the separation point. Be careful and check your filters especially when buying fuel from above ground tanks like LOTW. They have filters on their tanks too. For water.
I would highly suggest a search on fuel phase separation for all and watch how phase separation occurs and why. Controlled E10 fuels are perfectly safe but they are not all controlled. Fuel cleanliness varies from station to station and tank to tank. Ethanol content can not exceed 10% but it can vary anywhere from 0-10%. Water in these fuel also varies. It does not take much water to contaminate fuel. When phase separation occurs both the ethanol and water separate together from the gas leaving the gasoline at a much lower octane rating. Both the ethanol/water and the gasoline in phase separation are bad and can quickly destroy an engine.
Be careful.
