Yeah I have a 1.5 hour freeway drive to our weekend ski area and we use a low profile roof box on a crosstrek and get about 26-27 mpg.

Without the roof box and snow tires it gets 31-32 mpg. So I lose at least 15%.

It’s often between -10 to +15°F as well. I don’t think I could make it round trip in the winter. At least with the skis on the roof.

As of last season there was no charging at the mountain. There was a regular Deplorean and one Lightning in the parking lot, but I’m pretty sure the Lightning guy was local.

Side note. The parking lot is probably 40% Subarus. Never seen a B4Xwhatever there.