> I've asked this question to many people and they never had a good response. One might suggest: A) Reading what it says on the tin can what it is for B) Con

> I've asked this question to many people and they never had a good response. One might suggest: A) Reading what it says on the tin can what it is for B) Consulting its Wikipedia page, which states in the first sentence that it is a https://en.wikipedia.org/wiki/Penetrating_oil https://en.wikipedia.org/wiki/Penetrating_oil, and that article further explains what those are good at, and what not.