jnr1981 is correct! any mineral based oil will eat away at your o-rings causing them to perish and fail. i tend to use a thin pneumatic oil in the air side, and a silicone based spray on the bolts or anything fast moving. and a touch of grease on the mechanical triggers and sear/releases never hurt either! hope this helps.
for cooking with? yes, its perfect!! but seriously, you could on the air side but it is a bit skinny for the constant lubeing of the fast and constantly moving parts. for the cost of some decent oil is it worth damageing your marker?