Thanks guys, they have the accu-lube lb-2000 on the j&l site, this is a heavy duty fluid, but not the lb-5000 which is the aluminium one. I think it will do, but if anyone has a second, could they confirm since it is rather pricey.
http://www.rocol.com/lubricants/engl...king/acculube/
The lb-2000 is slighty more hazardous then the 5000, and needs to be cleaned before heat treating - not that I intend to heat treat anything, but does this mean it may stain the aluminium?
Otherwise I will give the cooking oil a go.