This is just more of a curiosity than anything real important.

Often when I work on my 1995 Ranger, nuts and bolts are a combination of standard and metric with no rhyme or reason that I can tell. Similar issue with my 2001 Mustang.
My daily commuter vehicle these days is a 2009 Prius. Sorry, as much as I like my Ranger and Mustang, 46+ mpg just changes things.
Honestly though the climate controls are just better as well but that may be just because so much newer a car.
I have had to do some work on my Prius and my roommate's Prius. Everything is metric at least.

Curious if the Mazda B series of trucks, the ones that basically look just like Rangers, are a mixture of standard and metric or pure metric?