In recent years, there has actually been an increasing controversy over the approved amount of ethanol in gas; trying to balance prices, ecological problems, and performance has made this a rather daunting task. The legal services limit for gasoline-powered engines is 10 percent; some producers of this item remain in the procedure of obtaining a waiver to increase the acceptable total up to 15 percent. This is where the conflict in between makers of engines and manufacturers of this sustainable power source is the sharpest.

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The arguments of opponents are additionally convincing. Manufacturers direct out that the much lower energy content of these energy mixes inevitably translates into more energy usage and greater prices for the consumer. The more recent flex-fuel motor vehicles, which make use of a blend of 85 percent ethanol and 15 percent gas, really have a lesser gas mileage than their standard equivalents. A second disagreement is that older engines (those made prior to 2001) are not accepted for the newer blends and could possibly endure damages. Last but not least, there is a continuous discussion regarding whether land that can be utilized for increasing meals crops should, rather, be utilized to produce crops for gas.