Great write up. The 1.8 Sentra seems like a nice car, I have never driven a Sentra, since Nissan didn't bring the car to Europe.
Is your CVT behaving silmiarly to the Honda CVT in the video blow? Those are km/h not mph and l/100km not mpg, but maybe you can tell anyway.
Honda CVT - slow city speeds:
https://youtu.be/fIkoOWz3yVA
Honda CVT - slow highway speeds with cruise control:
https://youtu.be/jJq3Wy68qMs
Here is a mpg to l/100km converter, if you're curious.
https://www.google.com/search?q=mpg+...g+to+l%2F100km