I saw a story here a week or so ago about a famer who grows rape, and filled up his tractor, and probably his cars with the rape seed oil that he made, and got fined for it....
Round here you can buy diesel for 98 centimes this week, (about 66 pence a litre for those lucky enough to live in Britain), and I agree, you can't buy cooking oil that cheap.
Although, I've seen the locals pushing carts full of cooking oil in the supermarket car parks.....
Like your web site, hope business was good this year - most of my acquaintances who have gites in Vienne didn't do so well.
gdb