Mine is 318wh/mi over my last 5,700 miles, mostly on the freeway. Is there a lifetime number displayed, I see only trip a/b numbers. Getting 50 or 60% of the e

Mine is 318wh/mi over my last 5,700 miles, mostly on the freeway. Is there a lifetime number displayed, I see only trip a/b numbers. Getting 50 or 60% of the expected mileage seems impossible. Maybe driving 80 mph constantly speeding and slowing up in below zero Fahrenheit weather? My s is 8.5 years old. I'm getting way better than the article does.