I mention this because, on my prior journey, I also mostly drove my Kia Sorento PHEV

Automatic mode (by using the EV/HEV button located between the front seats,  

slightly below and to the right of the gear selection knob), but I achieved far greater fuel efficiency.  

The difference might just be the result of my driving speed on the several journeys made a year apart,

even though this year's temperature was about 10 degrees Fahrenheit warmer

During this journey, I also used the Automatic mode for about ⅔ of the distance and turned