If you read up on cast iron and you know what our cooking foremothers knew (and cooked with) you will buy lard, if for nothing else than to season your skillets and put on after cooking with them. (lard lasts a long long time and is cheap) Unlike vegetable based oils it will not form a sticky residue regardless of how high you heat it. If you have cast iron grates on your grill - use the lard to season those, as well.