I've never seen 85 Octane at the pumps in Canada. that said I think the min recommended is 87, I throw some 91 in during long trips and this engine loves it.
How many miles or kms do you have on your truck?
That's hard to believe, i don't think the borderline does much to change the weather...lol.
I can remember Toyota Corp. doing cold weather testing for Lexus prior to launching, in northern Alberta when I lived in Ft. McMurray back in 1988.
Could be a ton of things, truck started and drove fine. Going to be very cold here for several days I'm sure it will return to normal when the temps improve by mid week.
My understanding is that tariffs only apply to goods that are ordered and in transit after Feb 1st, that said I'm sure there will be a lot of confusion to start out this insanity, hopefully it is short lived.
My truck fuel economy improved greatly after the break in period and again after first oil change.
Currently getting 18mpg city with my winter tires on and lots of warm up time on those-20c or worse days.