here is a quick write up on greases for polyurethane suspension bushings. hope it helps somebody.
when installing those poly bushings think about a grease zerk along with a line up hole in the bushing to allow the grease zerk to get grease right into the contact area where the grease is needed. some stainless body washers on each end of the bushing has also worked for keeping the grease inside the bushing, for me anyway.
https://www.suspension.com/blog/the-...hane-bushings/