I admit it, I love LW (liquid Wrench). At class we are allowed to use only TriFlow. We are in a very small work room. It gets stuffy in class very easily. There are 10 or 11 of us all intent on our projects. Can you imagine if we were all spraying nasty petro chemicals? This stuff does work quite well. It seeps down into the small nooks and crannies and it does penetrate and loosen old gunky dried up oil. I probably will use LW again. But probably not as much.