It does smell more like burning plastic than anything else I can describe. The B58 does run hot so this may be what it is. (Still running the thin 0w-20 too). Car is still somewhat new.
This is what I believe it may be. Car was bought with 5K miles in great condition. I believe the previous owner didn’t drive it as hard as me and mostly everything may be breaking in now. Still not sure what exactly is breaking in from the smell though. I’ve also noticed the brakes are more...