Ultra Marine Stabilizer/Cleaner 6/24oz We use advanced technology to design VP Ultra Marine, the best fuel stabilizer for boats. Ultra Marine slows the fuel aging process and keeps fuel fresh by helping to inhibit phase separation, which is an effect of ethanol. Phase separation occurs when enough water has contaminated ethanol-blended gasoline. This causes the ethanol to attach itself to the water molecules. Its important to note that ethanol is hygroscopic. In other words, it absorbs moisture from the air. As a result of phase separation, the water/ethanol separates from the gasoline in the tank and settles to the bottom. This can lead to engine knock and other serious issues. This is where a marine fuel additive can help.
