A Wine So Bad if it was used as Biofuel my Car might Refuse to Start

A week or so ago, I had the misfortune to be offered a sip of a white wine that tasted worse and worse as it lingered.
All I wanted is to clean my mouth of this unpleasant experience.
If this one was used as a biofuel would my car refuse to start I wondered.
How could anyone come up with such a bad wine?
Why would anyone buy it and offer it to their guests?