This year's American Customer Satisfaction Index, a study put together by the University of Michigan's Ross School of Business, shows that the home state's automakers are losing ground in customer satisfaction to European and Japanese manufacturers. The report shows brands like Buick, Cadillac and Lincoln-Mercury dropping compared to Honda and Lexus — directly contradicting Consumer Reports and JD Power surveys that show American cars on the rise. Though Saturn posted the biggest gain in satisfaction, Chevy posted the biggest loss. It could be that cutbacks are taking their toll; more likely, people are suddenly not so pleased with that Expedition EL now that gas now costs a billion dollars a gallon. Full scores after the jump. Company / Score / Year-Over-Year Percentage Change Lexus / 87 / 0.0% BMW / 87 / 1.2% Honda / 86 / 2.4% Toyota / 86 / 2.4% Saturn / 85 / 4.9% Cadillac / 85 / -1.2% Buick / 85 / -1.2% Hyundai / 83 / 0.0% GMC / 83 / -3.5% Lincoln, Mercury / 83 / -3.5% Nissan / 82 / 2.5% All Others / 82 / 2.5% Mercedes Benz / 82 / -1.2% Volkswagen / 81 / 1.3% Ford / 80 / 0.0% Mazda / 80 / 2.6% Pontiac / 80 / 0.0% Kia / 80 / 2.6% Chrysler / 80 / 1.3% Chevrolet / 79 / -3.7% Dodge / 78 / -2.5% Jeep / 76 / 1.3% Subaru / NM / N/A [Source: The ACSI via The Detroit News]