Royal Purple manufactures high performance lubricants for most automotive, industrial, marine, motorcycle and racing applications. It is considered the best synthetic oil - The Performance Oil That Outperforms by many end users. Royal Purple focuses exclusively on developing state-of-the-art lubricants. Royal Purple was acquired in 2012 by Calumet Specialty Products Partners (CLMT), a leading refiner and processor of specialty hydrocarbon products headquartered in Indianapolis, IN.