Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This stuff shouldn't exist.

I might as well add another positive comment. This is thus far the best penetrating oil I've ever come across, which is no surprise, every Kano product I have used is simply unsurpassed in performance. Every mechanic shop on this planet should have a can of Kroil handy at all times. Not only trash other penetrating oils, toss the breaker bars too. This stuff is just to good...