E10 is the new European environmentally and CO2-friendly petrol, which has added ethanol. Ethanol fuel blends are labeled "E" and a number that describes the percentage of ethanol in the blend by volume. Eg. is "E10" 10% ethanol and 90% gasoline. In Denmark, 5% is added. They have a goal called 10% throughout the EU. By using E10 Fuel Improver additive in the petrol, you prevent damage to the tank due to Ethanol from the petrol. Recommended by leading European car and boat manufacturers.
