Since its launch in 2003, the flex has dominated the market and expanded the options for drivers. Most plants offer models with both fuels: ethanol and gasoline. Ethanol has always been cheaper compared to gasoline, which creates the illusion of saving fueling him. But is it always fill your car advantage with alcohol?
The answer is no. While it is cheaper alcohol has lower performance than gasoline, or spend more to rotate the same distance as gasoline. In numbers, this means that a car fueled with ethanol consumes 30% more fuel. So there’s only advantage in putting alcohol in the car if the cost of fuel is up to 70% of the price of gasoline.
To check if it’s worth just make an account is simple. Divide the value of a liter of gasoline by alcohol. If the result is less than 0.7, the alcohol use. If larger choice gasoline. Example: the value of alcohol and $ 1.45 gasoline, $ 2.90. This result of the division of first by second, is 0.5, which is smaller than 0.7 (70%). Soon, more advantageous fuel with alcohol.
Vale points out that the advantage of gasoline in autonomy is applied to all vehicles, either 1.0 or 2.0, for example. Also there is no influence of other factors that consume more fuel as the use of air conditioning, heavy car, transit or stretches of mountains.
There are many stories that fuel the car is better than alcohol with gasoline, as ethanol is not as “good” as gasoline. Have also heard that the car gets used with a fuel, or even if the car constantly fill with alcohol, will sometimes supply with gasoline. For specialist automakers and this is myth!
With current technology, in relation to maintenance and wear of parts of motor cars with flex, no noticeable differences or problems arising in supply for any alcohol-gasoline ratio. What is remember to do mechanical processing, ie when the car does not come in factory original format bi fuel may cause problems.
Today is another reality. Proof of this is that hybrid cars do not need more alcohol to warm up before starting to run.
What fuel pollutes more?
Alcohol Fuel: Composed of hydrogen, carbon and oxygen. Also called ethanol or ethyl alcohol, is produced by fermentation from sugar cane, ie it is not a fuel derived from petroleum, for that alone takes advantage burning emits less greenhouse gases in the atmosphere.
The calorific value of alcohol is 6300 cal / g, this value represents the ability of the fuel to release energy when burned. In the case of alcohol the value is high, meaning that he is able to move the car with less fuel burning, which reflects in less pollutants.
Gasoline: basically composed of hydrocarbons (carbon and hydrogen). Presents as its combustion products, carbon dioxide and carbon monoxide. Carbon dioxide (CO2) is a dangerous gas that contributes to the greenhouse effect and global warming. Already the carbon monoxide (CO) is a gas formed by incomplete combustion and accumulates in our atmosphere as a pollutant (smog haze = dark). Both are harmful to humanity. Ethanol is a fuel that does not affect the ozone layer. (Source: mundoeducao)
Conclusion. If you want to contribute something to the environment can get in position, choosing fuel. For this purpose, alcohol is the best option.