So let me get this straight..... My wife comes home with my MKZ and parks in the garage and she could get locked in there overnight until I find her in the am? Frankly this does not sound all that bad.... Was this an option on my 2017? I may have ordered that option if available! Probably called "Free night locking system for the guys check box 2"
Just for fun I filled with mid-grade 89 to see if there would be any difference from 87. I feel no performance difference however have noticed that so far about half way though the tank and I am getting 1mpg less. Not exactly scientific of course but so far I notice no gain in spending the extra $4 or $5 per tank for the slightly higher octane #