Petroleum
Petroleum
Petroleum, sometimes called "petrol" or "kerosene," is one of the most famous and most misunderstood aromas in wine, a genuine, prized marker of aged, high-quality Riesling rather than any kind of contamination.
What does it smell like?
Petrol or kerosene, sharp and mineral, often emerging alongside honeyed fruit in aged Riesling.
This character is one of the most polarising in wine, adored by Riesling enthusiasts and confusing to newcomers in equal measure.
Aroma Classification
A primary aroma that intensifies significantly as a tertiary character with bottle age, produced by a compound called TDN.
Nature's Influence
Climate
More pronounced in warm, sunny growing seasons with significant sun exposure on the fruit.
Rare in very cool seasons.
Occasional in moderate climates.
Common in warm, sunny vintages, particularly with age.
Sun exposure on the fruit, more than overall climate category, is the key driver of this compound.
Soil & Site
Sites with strong sun exposure encourage the development of this character over time.
Vintage
Warm, sunny vintages develop this character earlier and more strongly.
Warm, sunny vintages intensify this character.
The Winemaker's Hand
Harvest Timing
Not directly linked to timing so much as overall sun exposure through the season.
Fermentation
Not directly linked.
Extraction
Not directly linked.
Maturation
This character is fundamentally a product of bottle age, it is rarely present in young wines and builds steadily over years.
Rarely oak-aged, this character develops independently in bottle.
Common vessel for Riesling carrying this character.
Bottle age is the essential, defining factor , petroleum character rarely appears before five years and often intensifies for decades.
This is one of the clearest single indicators of a genuinely mature Riesling.
Blending
Not a blending decision, develops after bottling regardless of blend composition.
Where You'll Find It
Typical Wine Styles
A hallmark of aged Riesling from Germany, Alsace and Australia's Clare and Eden Valleys.
Typical Regions
What Does It Tell You?
- Significant bottle age
- Riesling as the variety
- essentially exclusively
- A warm
- sun-exposed growing season
Far from being a flaw, this character is actively sought out by serious Riesling collectors as a mark of genuine maturity.
Food Pairing
Similar Aromas
Is petroleum character a wine fault, similar to something going wrong with a car?
No, this is one of the most common misconceptions in wine. Petroleum character is a natural, well-understood, and often highly prized outcome of aged Riesling, entirely unrelated to any actual contamination.
Learn to Recognise It
- Is there a distinct petrol or kerosene note alongside honeyed fruit?
- Is the wine an aged Riesling, typically five years or older?
- Does the wine still show bright acidity alongside the character?
- Was the vintage particularly warm and sunny?
Petroleum character alongside continued acidity and fruit is the sign of a genuinely well-aged, high-quality Riesling.
Petroleum is perhaps the best lesson in Aurenloch about the danger of assuming based on name alone. An aroma that sounds alarming turns out, with real understanding, to be one of the most prized outcomes a wine can offer.
TDN, the compound responsible for this aroma, was long thought to develop purely with age, but research has shown that sun exposure on the grapes themselves during the growing season is just as important a factor.