I've never seen Concoco branded oils in my area, but the Phillips, 76, Motorcraft, and Kendall products can be found. Interestingly, Conoco and Pennzoil built the Excel Paralubes hydrocracking facility as a joint venture years ago. Pennzoil made a big deal about their PureBase base oils from this plant, but I think that since SOPUS took over, they don't use it anymore. Conoco still uses these base stocks though.
So, in answer to your orginal question, yes they is.