I recently purchased a Norton IB8 1-by-2-by-8-Inch Fine/Coarse India Combination Oilstone, after seeing it recommended here. I have very little experience with sharpening, and the country where I live does not have a Norton retailer - which means I can't get Norton oil unless I order it online.
My question is - do I HAVE to use their specific oil or can I use some other kind of oil on my India stone? I'm not looking so much for brand names but more to understand the principle - what kind of oil is the oil used for sharpening? Once I understand that I'll be able to get a replacement perhaps from a local hardware store.