Never use oil on an oil stone , Ok i will explain that further "honing oil" is what you need NOT CASROL GTX , 3 in 1 etc etc. and its very available its very much like kerosene , indeed it very well might be but hey as its easy to obtain in town let alone on -line , why the Heck would you use something else? .
if you have a waterstone only ever use water and remember they need a long soak
Diamond stones are to be used dry
Personally i have a very old oil stone that i use 99% of the time , I have a set of diamond stones i take with me on trips , not for my knives as i am good to above 50 beasts or so (more than i have had in a week) but for " could you please ...... ? "
If you have an oil stone that's contaminated by water , dry it in the oven on a low heat then soak it submerged in honing oil .