A class action suit filed in Camden, N.J., federal court says Subaru cars have an engine defect that causes them to burn excessive amounts of oil.

According to the suit, class vehicles burn a quart of oil every 1,200 miles. Defendants Subaru of America and its parent, Fuji Heavy Industries, are well aware of the defect but failed to warn customers about the problem or provide any adequate remedy, according to the suit.