I understand Mazda disallowed *Flexible* oil change schedule for 2016 CX-5 in Canada, is it still the case for 2018 MY?
If you can*t use Flexible OCI, then you may have to follow the *Fixed* OCI specified in the ownee*s manual, just for warranty purpose although I believe changing oil at 2100 KM is too early, waste of money, and not good to our environment.
from what i remember in the manual (dont have it on my at this moment) there was no mention of the flexible option for canada so my assumption is that is not available no. In the 2018 manual US/Mexico intervals are 8000km or 1 yr but Canada is 8000km or 6 months. agree with everything you've stated in terms of the negatives. but i guess i have no choice if i want to be safe re warranty.