WALTHAM, Mass. -

Consumer car dealer review site DealerRater announced the findings of its 2015 Consumer Rating Index. Based on nearly 416,000 reviews taken between March 2014 and March of this year, the company ranked manufacturers, on a dealership level, based on a five-point scale.

Ranking first among the mass market brands was Subaru, with a score of 4.757 out of 5. Lexus ranked highest among luxury brands, with a score of 4.824.

“Consumers are adding online reviews as a critical element to the car-shopping equation,” said Gary Tucker, DealerRater’s chief executive officer. “The Consumer Rating Index allows car shoppers to evaluate how brands stack up against each other in terms of customer satisfaction at the dealership level.”

Rounding out the top three for the mass market companies were MINI (4.746) and Honda (4.733) while the rest of the top three for the luxury brands were Mercedes-Benz (4.781) and Porsche (4.749).

DealerRater’s rankings for luxury brands were based on ratings with at least 500 reviews while mass market brands were required to have at least 1,000 reviews. The rankings are based on numerical averages of all reviews that are attributed to a specific OEM. For a complete listing of the ratings, click here.