Data point: I bought a Skoda because of its claimed efficiency. It wasn’t the only factor, but in the balance of weighing things up, I cared that the stated emissions and fuel efficiency were better than some of the competitors.

I was lied to. Had I known that was the case there is a good chance I would have gone with a different car.

My car was recalled and reprogrammed and it no longer had the torque it had at first.

Of course now it’s clear that most if not all manufacturers were doing the same trick, they just weren’t caught at it.