I can get 60mpg when I 'hypermile' my prius, really not hard either.
No way an Echo could do that.
Regen brakes gets a lot of 'attention' because it is like 'free energy', but it is not very significant; unless you drive like my son drove his Prius, race to a stoplight, then jam the brakes, race to the next stoplight.
He would get only 45mpg.
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