Since there is no such holiday yet, I am happy to declare today September 24th as 'Black Oil Day'.

Please celebrate this holiday with us and add your black oil pictures...

Happy Black Oil Day!

I remember picture 2 and 4 very well...that was in my old apartment. very cool. we have to do that again.

I believe what you're seeking falls on September 6th: The Spanish 'Fiesta de Cascamorras'.

You should definitely visit - I think you'll like it.

@Plonk: Oy yes definitely! Thank you. Here are a few more black oil shots.

Out of curiosity, exactly what kind of black oil is being used in these shots, what's it made of? The most obvious black oil most people will be familiar with is used engine oil, but that's definitely not something anyone wants to be warming with as it's carcinogenic. So guessing this is something else?

Good morning, thank you for asking. Yes, engine oil would be horrible to use on skin.
What we are using is a mix of theatre makeup ingredients, dry black pigments on 'Hydro' oil used to remove grease makeup. Both are manufactured by Kryolan.
Oil and pigments can be mixed before using or on the model's skin.
It is quite an effort to wash off.

I am sure there are some more photos of ladies in black oil out somewhere...
You are warmly invited to post.

Thank you @warpicsberlin for adding this great shot from our wonderful shoot with gorgeous Nat here.

So today, I am just going to add some more.