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ICE mode efficiency

4767 Views 7 Replies 8 Participants Last post by  Head_Unit
Driving my 2017 for the first time on a long trip requiring gasoline I wondered if I wanted to get the most mpg out of my gasoline should I be in normal mode or hold. I realize hold is normally used to save battery for city driving later but if that is not a constraint which mode gives best use of gasoline at highway speeds and why?
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Drove to Chicago in "Hold" mode on Wednesday, about 270 miles at mostly 70 MPH through rain, ambient temp about 45 deg F. ICE registered 46.3 MPG. Going home today and will do the reverse drive and see if I get the same mileage.
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