The cops who arrested NASCAR honcho Brian France found 5 oxycodone pills on him during the bust and used the website Drugs.com to identity them ... this according to court docs obtained by TMZ Sports.
The Sag Harbor PD says the pills -- yellow in color, labeled T194 -- came right up on the website ... which touts its "pill identifier" feature on the home page.
Don't worry, the cops also submitted the pills to the lab for confirmation.
There's more ... cops say France's blood alcohol level was .19 -- more than twice the legal limit in New York when he was busted at 7:08 PM on Sunday.