Since Blackstone raised their already high prices, one of the members on here told me about NAPA oil analysis. They use the company below. I just purchased 2 kits @$13.99 each. I haven't sent them in yet but thought you guys would like to check out their website. Looks real professional and informative.
http://www.alsglobal.com/en/Our-Services/Industrial/Tribology/Downloads.aspx
http://www.alsglobal.com/en/Our-Services/Industrial/Tribology/Downloads.aspx