Actually, it was the Emerson Fittipaldi commercial:
"A Kia commercial featuring racing legend Emerson Fittipaldi piloting an ʼ18 Stinger around a track is iSpot.tv’s most-viewed automotive ad – those which have racked up the highest number of impressions across national broadcast and cable TV airings.
Besides being the most-watched ad for Feb. 26-Mar. 4, the Stinger commercial had the best iSpot Attention Index (169) in the rankings, getting 69% fewer interruptions than the average car commercial (interruptions include changing the channel, pulling up the guide, fast-forwarding or turning off the TV)."
1. Kia: What Every Racer Needs
277,008,441 Impressions, 97.50 Attention Score, 169 Attention Index, $3,748,908 Est. TV Spend