That’s interesting about the colour additive phope, thanks for posting up the photo.
I’m guessing the colour additive is some sort of preventative measure to dissuade children and fluffy pets from having a few glugs of it(?)
The thinness reminds me of some of the (snake oil low friction) additives we’d chuck in the oil of modified cars years and years ago when oil was much thicker. At least thick oil didn’t weep through the gaskets too badly on our ageing cars back then!
With super-tight manufacturing tolerances nowadays, and things like stop-start and turbos requiring very fast circulation of oil on start up the thin oils are probably a necessity but it’s still surprising to see exactly how thin they actually are.