Petroleum hydrocarbons react with oxygen and ozone resulting in the formation of polymers that are typically called “varnish” when they show up in fuel systems. These polymers are not very soluble in gasoline and settle to the bottom of carb bowls and clog filters and injectors.

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Don’t make these assumptions! It can prevent water from freezing inside the gas tank too, so you will never have to deal with all that extra work again. Overall, it improves engine performance due to less wear on valves and piston rings.

Ethanol is also hygroscopic, meaning that it absorbs moisture from the air around it, and this can cause problems when fuel is left to rest in tanks for long periods. Is it safe to use E10 fuel in my motorcycle? As almost all ethanol blended into petrol in the UK is renewable in origin – known as bioethanol – the fuel manufacturing greenhouse gas emissions – known as ‘well-to-tank’ emissions – are significantly lower than fossil-derived petrol. Therefore, increasing the bioethanol content of petrol will reduce the greenhouse gas emissions of the UK’s petrol and overall UK petrol vehicle carbon emissions.” Related articles on MCN So far, you understand that you shouldn’t use a fuel stabilizer when you don’t plan to store the motorcycle. Now the question arises, what does a fuel stabilizer do? How long does it take gas to go bad? If the gas in the engine of a motorcycle is not properly stabilized, it can begin to fail in as little as 30 days. As the gases are exposed to oxygen, the chemistry of the gas changes, which can result in gum and varnish deposits. Are Fuel Stabilizers Necessary? Baker says: “The vast majority of riders in European countries that have introduced E10 petrol have been able to use it without any issues. There may be some models that cannot use E10, such as historic motorcycles that utilise fibreglass tanks.”

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At the moment, normal unleaded (confusingly called ‘Premium Unleaded’ despite being the standard stuff) is ‘E5’, which means it has no more than 5% ethanol content. Ethanol is simply alcohol, and normally comes from renewable sources so it’s ‘green’ compared to petrol from oil wells. As its name suggests, E10 has a higher ethanol content of up to 10%. Mixing a stabilizer with the fuel will protect the fuel from untimely evaporation. This concoction is likely to last for a year or more (or less) depending on the fuel stabilizer’s brand.According to the U.S. Energy Information Administration, ethanol is produced from biomass, usually by fermenting sugar from corn, sorghum, barley, sugar cane, or sugar beets. It is anhydrous (less than one percent water) alcohol manufactured to meet ASTM Standard D4806 for use as a fuel in spark-ignition engines. In the U.S., most ethanol for fuel is produced from corn; denaturants (usually pentanes) are added to fuel ethanol to render it undrinkable.