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low mileage on start-up?

4K views 7 replies 7 participants last post by  gamatt 
LOWEST EMISSIONS is the primary goal of Prius, not HIGHEST MPG.

Heat is needed to make the chemical reaction in the catalytic-converter work. So, the engine is run to create that heat, which means some gas is actually sacrificed for the sake of cleansing exhaust.

As a consequence of that design choice, you will notice reduced MPG whenever the engine is still cold.

In other words, avoid short trips. Take advantage of a warm engine.
 
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