US consumers rate Porsche as the highest-quality automobile according to Forbes Magazine.

Forbes averaged out scores of two J.D. Power's surveys -- one that rated consumer satisfaction on 2010 model cars after 90 days of ownership and one that rates the same after three years of ownership. They also factored in scores on quality from a survey done by automobile industry research firm ALG.  Porsche topped the list with an average score of 590.2.  “The perception of the quality of the mainstream is certainly a cut below the luxury brands," Eric Lyman, the director of residual values for the automotive analysis firm ALG, told Forbes.  "People expect that a luxury good has higher quality -- that's why it's considered a luxury good," Lyman said.  Click here to see what US consumers already know.