Cream shortening in a large mixing bowl; gradually add sugar, beating until light and fluffy. Add eggs, molasses, and milk; beat well.
Sift together flour, soda, salt, cinnamon, and cloves in a medium mixing bowl. Stir flour mixture into creamed mixture, stirring well. Add oats; stir well.
Drop dough by heaping tablespoonfuls 2 inches apart onto ungreased cookie sheets. Bake at 350° for 15 minutes. Cool slightly on cookie sheets. Remove to wire racks to cool.