Petrol note is a kerosene- or diesel-like aroma that can develop in some wines, most famously mature Riesling. It is associated with the compound 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN), which can form from precursors in grapes and increase during bottle ageing. The aroma is considered a characteristic of some Rieslings by many tasters, although its intensity and acceptability vary.
The petrol note is most closely associated with Riesling from Germany, Alsace, Australia and other regions. It may be more noticeable in wines from warm, sunny growing conditions or after extended bottle ageing, but vineyard exposure, grape chemistry, winemaking and storage all influence TDN development.
Descriptors include kerosene, petrol, diesel, wax, resin or sometimes a faint smoky note. At low to moderate levels, the aroma may add complexity to mature Riesling. If extremely pronounced or unbalanced, it can dominate the wine and be less appealing to some guests.
A petrol note in Riesling is not automatically a fault. It is a recognised ageing-related aroma, unlike cork taint or excessive volatile acidity. However, the wine should still be assessed for freshness, balance and storage condition.
Example: a mature Mosel or Clare Valley Riesling may show a subtle petrol note alongside lime, honey and dried citrus aromas.
Chef’s note: explain the aroma to guests without assuming they will enjoy it. Some prefer young, fresh Riesling, while others value the complexity that develops with bottle age.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
