Hello,
PSA does. Indeed, there's an agreement in France for companies to fill their tanks with this 30% mix in the case of captive fleet (the cars which never leave a closed area). And so, they use HDis with that fuel... These cars musn't have many miles, even if the production sites sometimes are gigantic. I've been visiting once the Sochaux plant, some cars* were parked with a big sign on the bonnet saying "Usage interne" (: internal use) and having no reg plates.
- Among others, a 307, a couple of days before its official launch. Eeeer I've seen a lot of them around, indeed :-)
Regards,
-- G.T