In 1985 a small number of producers of Austrian wine were found to be compensating for overproduction by adulterating their product with diethylene glycol. This made the wine appear sweeter and more full-bodied.[4] The amount added was not high enough to be immediately toxic (one would have to ingest about 28 bottles per day for two weeks); however, exports of Austrian wine collapsed. As a result strict regulations were imposed on Austrian winemakers, and the industry moved from the bulk production of somewhat sweet wines to lower yields of high quality dry wines. Thus the 'antifreeze scandal' is now regarded as having been positive for the industry in the long-term. [5]

http://en.wikipedia.org/wiki/Diethylene_glycol