Cars have gotten heavier and heavier, which explains some of it but not all of it. My 10 year old 4000lbs 3.5L sedan gets better mpg than lighter 2024 cars wit

Cars have gotten heavier and heavier, which explains some of it but not all of it. My 10 year old 4000lbs 3.5L sedan gets better mpg than lighter 2024 cars with less powerful, smaller engines... I think aero probably plays a part (sleek sedan vs tall modern designs). In terms of conserving fossil fuels it feels like we've gone nowhere. Tailpipe emission are clearly lower, which is great, but that's just part of the battle.