uco sludge Submitted by an Anonymous Greaser on Wed, 2011-11-02 14:55 I have sludge from uco about 2,000 gallons weekly. It is soft oil sludge and too good to be dumped. I will give them away if someone can use these. We are located in NY City.email@example.com. Reply to this post Your name Comment * Location * What code is in the image? * Enter the characters shown in the image.