I'm going on another road trip in my 2022 XC60 plug-in next month. It's all highway driving, so the battery will be empty after the first ~40 miles. Do you have an opinion on whether I should use Hybrid, Constant AWD, or Power for the best mileage?

In March, I ran the same segment of the Illinois Tollway back-to-back using the different drive modes and got:
Hybrid - 30.1 mpg
Constant AWD - 31.3
Power - 30.9

Clearly, this isn't a scientific test, but I was surprised. I'll be driving about 1,500 miles in the middle of June. Which drive mode would you use?

Cheers!