Ever think to check the old filter? A seller can dump in fresh oil, but they rarely swap the filter. Cutting open the old filter shows the real story, the metal that just got circulated out. That coolant test was your real warning light.

Didn't your inspection include a sewer scope?

That's a really good way to put it.

Campbell's right about the stand being a joke, it's the main thing holding it back from being actually useful. You can hack it with a third arm or some blue tack, but then you're just fixing a basic design flaw. It's a tool that makes you work for it, which defeats the whole point of a quick visual aid.

My buddy was convinced putting tape over his laptop camera made him invisible online.