Come on, surely you must have heard of this brand. Or at least seen their logo right? Their logo is that green circle with a thick red line acorss it. As for what it stands for, I have no idea. Maybe people dealing with oil and lubricants more often than not cut themselves - that is why there is blood.They are famous throughout the world and nearly even country has their representative. Castrol actually stands for Castor Oil. In the past, castor oil was mostly used to lubricants for vehicles. They make lubricants for both vehicles and industrial machines now. I am guessing in nearly every industry, there is always a need for lubricants. If not, things just won't move. And if things don't move, the whole world will grind to a halt. So thank god for lubricants! If you are interested in what they do or if you are thinking of selling or buying their products, you might want to visit their regional website for more information.