grease for sway bar with poly bushings?

[my65289stang]

I just put new Poly bushings on my sway bar and lubed them with valvoline suspension grease. The front end was nice and quiet for about 3 days and now it is back to creaking. I was going to take them out and clean them up and add some new lube. What is a good lube for poly bushings? I tried a search but couldn't find specific lube recommendations

Thanks

[SuperRA]

This is what is supposed to be for poly bushings.
http://store.summitracing.com/partdetail.asp?autofilter=1&part=PTP%2D19%2D1751&N=700+115&autoview=sku
But I think it will return to squeaking sooner or later. My pickup has the grease that came with the bushings and it eventually started squeaking.

[cherokee89]

White Lithium.