we aint talking running pure ethanol matey, E10 fuel has 10% ethanol as opposed to the normal 5% in E5?
your talking not even a espresso cup of ethanol (C2H60) in 3 liters of E5 or E10 fuel, older engines have rubber seals which was not designed to endure a higher concentration of ethanol in the fuel line and why most car engines before 2011 (before the worldwide change) are not compatible over a long period.
simple chemistry.
Petroleum - Chemistry - Hydrocarbons
A hydrocarbon is an organic compound composed of two elements, hydrogen and carbon. A large part of the composition of petroleum is made up of hydrocarbons of varying lengths.
ethanol (in the form of ethane, a gas member of the hydrocarbon family, same as hexane butane and propane gases all from fossil fuels) is found naturally in crude oil which all fossil fuels fuels are made from, they remove the ethanol and add ethanol again later (ethane most commonly in a gaseous state, is ethanol unrefined or "distilled" to create ethanol) with oxygen bonded to it due to the open ended atomic structure of any C2H6 compound to the completing the structure, so no it doesnt technically absorb water, it absorbs oxygen to form water by chemical reaction with atmospheric air, from its unlocked atoms combined with the atmospheric air in the fuel tank. C2H6O and also produces Co2 gas as a by product (its carbon and oxygen the hydrogens gone where, ahh its also decided to grab two oxygen atoms for giggles creating water as the outcome of said reaction., amongst others from the trace elements and additives under combustion. raw petrol and deisel are also hydroscopic to a degree due to their chemical makeup.
We rarely see it post combustion as water has a 100C boiling point to change state of mass, petrol is higherso it escaoes as an invisiblae gas form our tailpipe with other lovelys.
any hydrocarbon fuel is hydroscopic, clue is in the first part of the chemical compound (hydro means hydrogen and carbon based compound, crude oil, there are hundreds of hydrocarbon based compounds and lifeforms, our self included. when all life breaks down to the base elements of hydrogen, carbon, oxygen and other elements, we would also be a decent fuel in a few million years.
Carbon & Hydrogen (basis of the major components of all fossil fuels as its the remains of fossilised trees and dead dinosaurs made from hydrocarbon based lifeforms......), remove the carbon and what does all hydrocarbons break down to and absorb to loose atoms (oxygen with its dual bonds fit perfectly to every 2 carbon atoms, which is the most common element in the universe, Carbon.)....H20 aka water not by water absorption but by chemical reaction with oxygen atoms in the air and its own composition. Carbon is a stable element, sesier for the atoms to bond with oxygen, or Co2 which requires a change of state of matter to a gas, which again takes more energy so it bonds with oxygen more readily and available.
atoms are lazy. as long as its stable it doesnt care what compound its joining as long as it has enough bonds
