This is horrible!!!
http://grist.org/food/food-2010-10-25-a-close-encounter-with-chinese-sewer-oil/

Tadaaaa.......A 2003 AWF 1.9 TDI Saloon in alluring gold to replace the Ford Focus. 119k on the clock and has taken to 100% bio without a hiccup.

Pd engines exert a lot of strain on the cam lobes, these pressurize the pd injectors. There's plenty of info about wear of the cam lobes, risers and foll, first the chamfered edges becomes sharp followed by eccessive wear of the lobes and risers. I popped the rocker cover last sunday and despite some wear it looked OK, not bad for 167,000 miles. 

Fantastic biomas incinerator I saw last weekend. I have a friend who has one, it heats the whole house and then some. Capable of burning pallets, straw bales and tree trunks. Awesome!!