The touting of zinc-d as a special ingredient in engine oil additives is a little like the Shell ads which touted Platformate. (Most gasoline has similar additives but under different names.) Zinc-d is an additive in most, if not all, major oil brands.
Madison County is a county located in the Lead Belt region of the U.S. state of Missouri.As of the 2010 census, the population was 12,226. Its county seat and largest city is Fredericktown. The county was officially organized on December 14, 1818, and was named after President James Madison.adison County is a county located in the Lead Belt region of the U.S. state of Missouri. As of the 2010 census, the population was 12,226.
According to the United States Census Bureau, the city has a total area of 4.4 square miles (11 km 2), of which, 4.3 square miles (11 km 2) of it is land and 0.1 square miles (0.26 km 2) of it (3.17%) is water. Also found west of Fredericktown but still within Madison County is Black Mountain.Highway E runs along the base of Black Mountain, beside the St. Francis River. While Black Mountain is only the 42nd highest (above sea level) in Missouri, Black Mountain has the largest change in elevation from the base to the summit.he earliest European settlement in the area near what is now Fredericktown was Mine La Motte, a small community about six miles (10 km) to the north. Mine La Motte was first settled by Europeans to mine a large vein of galena lead ore distributed in dolomite that reached the surface there.