Buick is the first U.S.-based automotive brand to crack the top 10 in Consumer Reports magazine's annual brand report cards. It placed seventh in the brand rankings. But the brand rankings and top picks still were dominated by Japanese and German manufacturers with Lexus, Mazda, Toyota, Audi and Subaru taking the top five brand spots. The magazine calculates each brand's overall score with a composite of its vehicles' road-test scores and reliability scores for each model in its annual survey of subscribers. It's the third year for the brand rankings. Porsche placed just ahead of Buick at number 6, while Honda, Kia and BMW rounded out the top 10 brands. The rankings are closely watched in the auto industry, since shoppers consistently cite Consumer Reports as a main source of car-buying advice.