Review on 🧊 Blendin Ice Crusher Blade and Jar Base Cap, Rubber O Ring Seal Gasket Combo, Compatible with Oster and Osterizer Blenders by David West

Replacement blade and base fit my old oster blender perfectly but almost every time I use it black oily liquid leaks from ice breaker blade. Thankfully, this stuff didn't get into the food when I dumped it out of the blender, but I have to put a napkin or paper towel on the floor to catch it. I've been using the blender every day for over a month now and things are still coming out. It's in the cylindrical part of the blade, and although I clean it often, it keeps dripping out when swirled in the blender. Doesn't shed when washed, is that normal? How much black oily substance is there? Should it be sealed?