359 miles plus however many miles the dealer put on that tankful before I took delivery (<15), 0.7 (close to 0.6) gallons remaining according the dash readout, and 7.4 gallons to fill: looks to be 48.5+ mpg.

Mostly highway driving @60, but the first 50 miles were moderate speed urban driving, with a few pulls to redline and some paddle shifter and AC usage after that.