by Oddwookiee » Tue Feb 05, 2013 4:38 pm
^^^^^
Talk to any industrial chemical or oil supplier and ask for 'food grade white mineral oil'. There are a number of viscosities available, but if it's going to be for oiling after cleaning then storage, get one that's a little thick, similar to vegetable oil. Clean parts, and while still hot oil down and let cool, then store. I was told the hot parts (especially on cast iron) allow the oil to penetrate the metal better and makes for a more secure storage.
I don't know about the UK, but I can get a 55 gallon drum delivered from a half-dozen companies locally in 12 hours, so it has to be similar over there.