I saw a leading segment on NOVA Science Now on PBS about the red 1966 Volvo P1800 owned by the NY former school teacher OO that he's driven 2.7+ mm miles*, & is in the Guinness Book for it. Look for it on your local PBS channel.
Yup - that's 27 times turned over on it's 5 digit odometer like our 914s have!
It was also featured in Hemmings Sports & Exotics last year IIRC.
Interesting but not an in depth car guy/gal coverage, but nice to see old cars getting some wider "cred"!
*EDIT: The abbreviation above of "mm" or "MM" is from Roman Numerals for 1000x1000 = 1,000,000 or million.
So that's 2,700,000+ miles as of the show, 2,500,000+ miles as of the HS&E article linked below.