It's a step in the right direction. 80% potential improvement from powertrain efficiency alone. That's why we hypermile (I want a new name for it).
It's also a gruelingly slow process.
Manufacturers don't want to build the best car they can. It would ruin planned obsolescence.
What could they sell you for a replacement?
It will come down to "you can't get the parts for it anymore."
regards
Mech
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