A petrol (gasoline) aroma and flavor in wine comes from the proximity of vines planted near oil refineries.

Answer: False.

A petrol aroma and/or flavor in wine is caused by a chemical compound,1,1,6-trimethyl-1,2-dihydronaphthalene (thankfully known as “TDN”), which exists in grapes. This aroma and flavor appear more prominently in grapes that are exposed to sunlight and warmer weather. TDN may also emerge in wine that has been aged in bottle for a long period. Certain grape varieties—notably riesling—are prone to TDN.

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