Adding a "new" used car with existing mileage

[raprider]

Hi...
I am trying to add my newly purchased used car, a 2016 CX-5 with 41,750 miles on the ODO. I typically track my mileage by the odometer at each fill-up, so I guess I need to add an accurate starting number. Also, the dealer had provided me with a full tank of gas, so I'll probably be around 42k at MY first fill-up.

Thanks in advance!
Rap