The only way to know is to run more UOA's. If I was changing my own, I'd probably buy something else on sale at an equally low price, as it is the $10.88 service is an ok deal. This board is knowledgable but limited in size. In reality, we have no real proof that Castrol or Chevron is really better than Valvoline, there's simply not enough data to be sure. Most people who have oil related failures really abuse their cars, something no one here does.
Even the UOA's can be suspect since additive levels can vary greatly with the same lab running the same oil in the same car.
I read this forum because it's harmless fun. I don't believe any brand of oil is worth sweating over.