Sebaceans have red blood, Scarrans have red blood (SoD), bioloids have white blood (BHTB). Yes, Sikozu had orange tinged bloood, but she was a different type of bioloid, so it stands to reason that she'd had have a different lubricating system. (or whatever the purpose of that liquid is)
At the end of Incubator Scorpius had red blood, and in season 4 Scorpius had white blood.
Yet people don't seem think that Scorpius is a bioloid.