Here is an stc1000+... https://www.ebay.com/itm/Stc1000-Custom-Beer-Fermenting-Temperature-Controller/263968315676?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649
Based on some quick homework I did, the 1/3hp Superior Pump (model #91330) is filled with vegetable oil. That being said, I have read multiple threads were people have been using this pump for several years with no issues. But, if you want a truly oil free pump, here is one that looks like it...