There is always controversey about brands distributing their brands under other names. Is there any info introduced to your knowledge? I have a family member who worked in an oil refinery back in the 50's, and he says the same oil went into quite a few different oil cans. And back then there were probably only 5 different brands of oil. Of course there were those 'gas station' brands!
I have searched on and off for a few years and never come up with anything really