One is not comparing apples to apples with respect to gas mileage. The octane rating in Europe is 100. The octance rating in the United States is 88 for regular gas. If one would obtain 100 octane gas in the U.S. AND the engine was set up to use 100 octance gas, then the gas mileage of U.S. cars would be increased. Would we pay even more than what we pay now for gas-- you bet!









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