Fuel prices have gone through the roof and, by predictions of analysts, are threatening to reach heights as high as $7 a gallon. Car makers are working hard to make fuel-efficient cars and technology is here to help them achieve their goals which are composed mainly of efficient engines and acceptable emissions. Discussed here are 5 popular cars that have proven that cars won't stop selling because of the rising crude oil prices or strict emission norms set by governments and authorities.
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