I surely am understanding that your thread is about being skeptical of the product. At least - that's how it's titled.
Taking your analogy - if you're skeptical about antibiotics - you'll simply not take them, ever. Because you're skeptical of them.
If you're skeptical about taking antibiotics when you're not sick - then you're not skeptical, you're simply sane - and it's the right choice. But it's also the mother of all "Duh!" moments that doesn't require a thread.
In its current state, the title of your thread is pure clickbait. The nuances revealed further down are dressing. It says skepticism about Valvoline Restore and Protect , not skepticism about Valvoline Restore and Protect when it's not needed.
And I am skeptical of the title being a misunderstanding