That cost saving might come back to bite you. Overused cutting oil loses its ability to cool and lubricate properly. I've seen it lead to faster tool wear and even cause tiny defects on finished parts that you only catch later. You might save on disposal now but spend way more on tools and scrapped work down the line.

Used to think it was just paranoia, right? Then my buddy had the same pizza ad thing happen right after we talked about it.

Terra cotta walls would feel so much cozier than bright white.

I had a digital scale pull that same trick on me with a bag of flour, showing two different weights back-to-back. The battery was almost dead and it was totally GLITCHING. Makes you question every electronic gadget in your house for sure.

Back in my shop days I thought fixing it was the only real help. Reading what @amymason does made me see giving them a next step is often the actual fix. Now I see the value in just handling that first venting moment for them.