What kind of grease could i use on eibach sways w/polyurethane bushings? Thanks...formula 1

 

synthetic wheel bearing grease or possibly brake caliper grease

 

You can also try putting 2-4 layers of teflon tape on the area of the bar covered by the bushings.

 

Interesting idea, wouldnt the movement of the bar tend to wear away the teflon tape though?
On my truck with grease fitting on the sway bushings, I just use synthetic grease in a gun, thats why I suggest that grease for us.

On my list of things to do- get poly bushings for the bars

 

mine are loud too, squeeky, squeeky