From the boys at the UK's leading Biodiesel site - http://www.biopowered.co.uk/forum/index.php
5 litres of pure 2-EHN for under £29 quid.
Turn all your diesel into super diesel for a few pence per tank.
Hydra Fuel Cetane Booster, Ultra Pure >99%
This seems an old matter, but being retro minded here, what are the implications (if any) if the current (post 2000) CDi engines are run on diesel fuel with higher levels of sulphur...i.e. maybe >500-1000 ppm like those available in other countries? I suppose the engines would run fine...