Technology has evolved in a very friendly way towards engine efficiency, however until anti gravity is invented the extra weight of features and safeties will always offset the engine tech.
What I don’t understand is that if people are allowed to buy motorcycles why are they not allowed to buy unsafe cars that get good MPG? What are the mandates for manufacturers? Pedestrian safety, side impact protection, airbags, stability control etc right?
While on the subject, why the hell do smart cars get bad MPG? They aren’t that heavy, aren’t all that safe and definitely don’t have a lot of HP. :ponder