i don't really know which one is better but i presume that after run oil is better because it is specifically designed for the engine after running. Although I just use wd40 simply because you can use it for everything!
I would just stick with ARO. Essentially, they do the same thing. WD40 displaces moisture which you don't want. ARO is not expensive by any means so I can't justify using anything else.
I would just stick with ARO. Essentially, they do the same thing. WD40 displaces moisture which you don't want. ARO is not expensive by any means so I can't justify using anything else.