Is mineral oil any good anymore for baby care?

No. By mineral oil for baby cares, I am assuming you are referring to constipation. The latter is common in both breastfed and formula fed babies. Usually we recommend prune juice in young infants and increased fiber in diet in older ones. Hydration is very important. If these methods do not work, a glycerin suppository can be used in younger kids; you should seek out your dr if constipation is common.