Lubrizol is a smooth operator -- the world's #1 maker of additives for lubricants and fuels. The Berkshire Hathaway -owned manufacturer has three business segments: Additives, Advanced Materials, and Speciality Products. The Lubrizol Additives segment includes engine oil additives that fight sludge buildup, viscosity breakdown, and component wear; fuel additives designed to control deposits and improve combustion; and additives for paints, inks, greases, metalworking, and other markets. Lubrizol Advanced Materials (performance coatings and chemicals) delivers its products to the personal care and rubber and plastics markets. Lubrizol Speciality Products makes oilfield chemicals and drilling fluids.