I miss my VQ-powered Maxima.
Anyway, some general points:
-- Being in Canada, you'd be wise to ensure any oil you select has a "0W" in the beginning of the viscosity spec. If mostly garaged, a 5W synthetic might be OK, but you will still have a cold start ungaraged at some point (parked at work, shopping, etc, for extended period). Engines cool pretty fast at -35.
VQs are prone to varnish, and this can undermine oil control ring effectiveness. Mine varnished a good bit even with all group IV and group V oils (M1, Redline, mostly).
I would recommend a couple short OCIs with diesel xw-30 with heavy doses of LC20 (no affiliation) in the summer time. See if the consumption doesn't improve.
Then go to a 0W-30 or 0W-40 of your choice (PP is my favorite, but hard to find in some locales).