The professional series products were created to compete for quicklube/shop shelf space along the lines of BG or Wynns.
Ebay might be your only choice if you don't have a shop that is stocking the product.
http://www.whitfieldoil.com/www/docs/189/
http://www.whitfieldoil.com/downloads/VPSServiceGuide711.pdf
Ebay might be your only choice if you don't have a shop that is stocking the product.
http://www.whitfieldoil.com/www/docs/189/
http://www.whitfieldoil.com/downloads/VPSServiceGuide711.pdf