Interesting test on various cutting fluids.
I enjoy his videos but his voice is rather annoying. He does his best to use unbiased testing and puts in a massive amount of effort.
Best part of the video is about half way through. Drilling through some armour plate.
Never realised the proper fluid made such a difference.
An American tester so not all products we are familiar with.
Best was Tap Magic followed by CRC3400.