The oil life monitor in the gen 6 takes into account time since last oil change in addition to miles driven, engine rpm, etc. It's recommended that engine oil be changed at minimum once a year even if the car has been driven minimal miles, and the OLM takes that into account. It'll hit 0% after a full year even if the car hasn't been driven a single mile.
Since its been ~1/3 of a year since the last oil change, it makes sense that it there's ~1/3 less oil life remaining even with only a few hundred miles driven.
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