INDIANAPOLIS, Dec. 6, 2021 /PRNewswire/ -- Royal Purple, the Synthetic Expert, is taking part in the 2021 Performance Racing Industry (PRI) Trade Show in Indianapolis this month. The show runs from December 9 – 11 at the Indiana Convention Center. Royal Purple's team of experts will be available at Booth 2651 to discuss Royal Purple's full synthetic motor oils and performance additives.