Dealership Problem

I say you need better documentation. The issue is NOT whether the car fails within warrantee, as it's reasonable to expect an engine to last far beyond 100K in this day and age. I'd want documentation, a signed admission from the dealer detailing their eff-up in case of future trouble

Pictures of puddles, or talking to other dealerships is not proof of a thing.

This might be worth talking to a lawyer, so far as I'm concerned, and at the price of these cars nowadays.