“Hyundai got in trouble for this in 2012. The company used highly optimized tires and cherry-picked favorable results that turned out to be unachievable in the real world. It got hit with a $100 million fine from the EPA in 2014 and reduced fuel-economy ratings across much of the 2012 and 2013 Hyundai and Kia lineups.”
I bought my wife Hyundai's flagship Genesis sedan back in 2012, and I wish I kept track of how many debit cards we got from them over the years as a result of that settlement. It was the gift that kept on giving.