If by sliders you mean the geared track for focusing, I suggest leaving them as they are...a bit stiff and crunchy. Since there's no way to tighten down the focusing bed, that friction may discourage slippage when the camera is inclined significantly either up or down. I, too, was disposed to want to give it a lube, but thinking it through a bit more, I'll not do so.
If you are referring to the black stainless steel shafts that permit tilts, rise and fall, there are nylon bearings there that would probably be better lubed with wax as suggested above rather than oil in case the oil might degrade the nylon. (I don't know if it will, but, I'll err with caution till I'm sure.)