Lodge preseasoned cast iron
as per their website its ou kosher oil
What type oil is used to season Lodge Seasoned Cast Iron?
We use a proprietary soy-based vegetable oil to season our cookware. This oil has been Orthodox Union Kosher certified. The oil contains no animal fat or peanut oil. The seasoning is functional application and slight inconsistencies may appear in the seasoning finish. The inconsistencies will not affect cooking performance.