Is there a need to oil a razor after use, and if so what shall i use?
I like to oil after use.
baby oil/mineral oil will do
I like Camelia a little better and can be found at WoodCraft or other hobby wood suppliers in the sharpening section.
I use TuffGlide and apply it after honing a razor. Once it has dried, you wipe of the excess and dry the razor well after each use. Nothing more to do until the next time you hone it. Much lower maintenance than removing and applying oil before and after each use.