So I finally figured out that a small squeak that I hear when I go over speed bumps or hit small bumps in the road is. It is my shocks making the noise. They are the shocks which came with Fabtech 7.5" lift kit for a 2003 F150 2wd. Are these oil based shocks and is there some sort of oil I can add to them to stop the squeaking?

 

Is there any type of oil I can buy to lube them up if they are oil based?