Should you choose for regular gasoline or gasoline with ethanol if you have a choice to pay one or the other at the same price per gallon?
You might make the wrong decision if you did not know that you get more energy out of a gallon of regular gasoline then out of a gallon that contains ethanol.
If the gasoline with ethanol is E-10 which is available now in many markets around the USA then there is 10% ethanol in that gasoline and there's an energy difference of about 3.4 percent.
Now that may not seem like much when you're topping off the tank this week. But over the course of a year of normal driving, it would take an additional 40 gallons of E-10 to go the same distance as conventional gasoline. If they were both priced the same, it would mean an extra $120.
Mileage can suffer by about 25 percent with E-85, according to AAA. Over the course of a year, that amounts to an extra 300 gallons of E-85 to go the same distance as when using conventional gasoline.
Even if ethanol-blended gasoline is cheaper, it can still end up costing you more because you're getting less energy. That fact has not been made clear to people. In effect, you can end up paying more for less.
The Bush energy bill of 2007 enforces a great increase in ethanol gasoline and that means an even bigger impact, nationwide, on the MPG.
In Kansas, there is no requirement to sell fuel with ethanol, but more than 50 percent of the gasolineoline sold in the state now contains ethanol. That is expected to increase next year when gasoline retailers in the state that sell E-10 will be eligible for tax credits.
Experts say it's difficult to blame E-10 for that much of a decline.
AAA now calculates a price for E-85 to adjust for its energy content. The national average pump price for the fuel on Thursday was $2.91 per gallon; regular gasolineoline was $3.56. The AAA calculation considering the energy content jumped the ethanol price up to $3.83 though which was twenty-seven cents more than the regular gasoline.
The energy economics of ethanol are a matter of concern to automakers such as General Motors Corp., which is counting on ethanol-fueled cars to give it time to develop other cars that can use other alternative fuels such as hydrogen.
So far, GM has produced 3 million vehicles that can use conventional fuel or E-85. The price of E-85 needs to at least be competitive, after being adjusted for its energy content, with conventional gasoline to ensure that more of it is used, the automaker says.
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There are other benefits, besides.
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