Yes most RC shocks use oil. Those ones should use oil aswell. I think you may have filled them wrong or you used the wrong oil. Here is a guide on how to fill shocks with oil. https://youtu.be/1_d1nEquS6Y You also can't use just like olive oil. There is specific RC shock oil. You can either pick some up at you're local hobby store or some of this should work good. https://www.amazon.com/dp/B0006N6TRY/ref=cm_sw_r_cp_apa_fab_iZoFFbZVWZGQE