Mandate by Executive Order the Toyota Corporation to implement a software setting update on all 2002-2014 Prius to reduce the US fuel consumption by one half billion gallons cumulative in a decade. The maximum speed setting in pure electric vehicle mode historically has been set at 62 MPH. This setting turns on the gas engine 100% of the time above this setting, -essentially during ALL highway driving. Ford’s 2013 Fusion Hybrid, released with 62 MPH, later issued a voluntary update making the setting 82 MPH. This allows highway speeds without running the gas engine, providing 4-5 MPG fuel efficiency increase (10%). The 2 billion Prius drive 30 trillion miles annually. This change saves 62 million gallons per year. Inaction needlessly burns roughly a million gallons per week to atmosphere.
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