I change all my vehicles oil at 6 months and never put more than 5K in on my Tundra or Prius in that time. I have Toyota care with both vehicles but do my own oil changes. I don’t care to take service advice from a business that sells cars.
It’s hard to say if it is WCP. My Prius prime is WCP and looks different depending on light. At night it looks like an actual grayish pearl color but is bright white in daylight.