(April 15, 2013) SANTA MONICA, Calif. — TrueCar.com has released its March Performance Scorecards for automotive manufacturers and brands. The Performance Scorecards grade each manufacturer and brand on eight different measurements related to pricing, sales, incentives, customer loyalty, market share and days in inventory data.

Overall, the top manufacturers on the March Performance Scorecard were Subaru, Toyota and BMW. Near the bottom of the list were Volvo, Mitsubishi and General Motors. The brands that received the highest grades for the period were Scion, Mini, Subaru, Lexus and Audi; while the brands with the lowest grades were GMC, Buick and Dodge.

The manufacturers with the largest gains, from February 2013 to March 2013 were:

    Toyota moved from a B- to an A
    Porsche moved from a C+ to a B+

The manufacturers with the steepest declines, from February 2013 to March 2013 were:

    Mitsubishi moved from a B+ to a D+
    Mazda moved from an A to a B-
    Ford moved from an A to a B

Below are the highest and lowest manufacturer and brand rankings by TrueCar: