This is on interstate 5 basically going between 152 and 580. Headwinds are painful. However, some days, like yesterday, I can stick to 76mph and do pretty well. I averaged 108mpg over 72 miles using electric and gas and still had 7% of the battery left when I got home. I keep my pressure at whatever the dealer sets it at. I gotta say Toyota did a pretty good job with the Prius prime 2020.
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