Because we discovered that running the engine lean and hot for maximum efficiency creates NOx and we don’t like acid rain.
Comment on 👴☝️I did that
adarza@lemmy.ca 3 weeks agowe’ve been going backwards on fuel efficiency. the little compact i had back in the early 90s got over 40mpg.
Spur4383@lemmy.world 3 weeks ago
mech@feddit.org 3 weeks ago
Greenpeace modified a Renault Twingo with off-the-shelf parts in 1996 so it could get 68mpg.
en.wikipedia.org/wiki/SmILE