Vegetable oils can go rancid and add off aromas, nothing wrong with it if used sparingly, and cleaned often. When I was a brewer, i used vasiline to lube seals and mecanicals. It's safe, but not rated for consumption.(Don't make biscuts out of it)
Non-scented baby oil can be a good subsitute for food grade mineral oil very good for sharpening knives, again, safe but not food grade.
Remember to use even food grade stuff sparingly, even fgmo will give some the trotts if too much is consumed.