Just changed the oil and filter on my 2025 XLE with the odometer at 600 miles. I then drove from Orange County in SoCal to San Raphael in the Bay Area, a distance of about 450 miles. My route took me along the 405, 5 and 580 freeways. The 5 fwy has some pretty good climbs before dropping down into the CA central valley, and similarly the 580 has some good elevation approaching the Bay Area. I set my ACC to 80 mph (pretty much what traffic was doing in the fast lane). I had a hitch mounted bike rack with a mountain bike loaded up on it, which seriously effs with the aerodynamics of the car. The car returned 35 mpg for the trip!! Should I be concerned? Thoughts....
Like many cars, it's MPG is directly impacted by the MPH and the terrain. I made the same trip this weekend in a 2024 XSE Prime. I drove at the escalated speed of 75 to 85 MPH. I normally make it from the gas station at the base of the grapevine to the Altamont Pass without running low on gas or electricity. I pulled into the corner gas station with only a few miles of gasoline range left. The traction battery still had 20% of it's remaining capacity as we pulled into the driveway. In general, if you want good mileage, don't drive into a headwind. Use the cruise control to moderate your use of gas.
