The computer in my Versa does the same thing. It's usually anywhere from 7 to 10% optimistic. I do hand calculations at every fill up. I've also got an Ultra gauge. I've done some re-calibration on it and it's usually within 2-3% of actual MPG. Maybe this is Nissan's way of making people who never do the math think that they're getting really great mileage hoping it will get them repeat customers.
Last edited by 2016 Versa; 09-29-2019 at 09:11 AM.
View my fuel log 2016 Versa SV automatic: 4.7 L/100 km ... 60.2 mpg (Imp) ... 21.3 km/L ... 50.2 mpg (US) ...