Epic Meal Time, right? The one where they had to evacuate the house because they literally pepper-sprayed themselves? Yeah, I was thinking the same thing myself – if they added a 500K Scoville sauce to a 1M Scoville sauce, then they’re actually diluting the sauce, not making it stronger. :dubious: That’s still pretty massively hot, though.
Correct; the Scoville scale measures how concentrated the sauce is, not the amount of it you put in. A drop of pure capsaicin has 16 million units, and so does a gallon.
That said, it’s harder to eat an entire bowl of nuclear tindaloo than a few bites, so quantity has a quality all of its own.
So, it would be possible to name a new unit of measurement, the Scoville Scoop, that has (nominally) the same quantity of heat units as one-tenth of a millilitre of pure capsaicin, and would equal a different volume of each kind of sauce, depending on their strengths.