Barrels Rule:

While barrels are known, lesser-known are the specific types like the "Tianjin barrels" used in Chinese markets

Unexpected Measures:

Ever heard of the "Petrojoule"? It's an energy-based unit for oil trade

Ancient Units:

Before barrels, oil was often traded in units like "amphoras" and "koyos.

Metric Mania:

In Europe, the "tonne" and "cubic meters" take precedence over barrels.

Local Preferences:

Some regions rely on units like the "koku" in Japan or the "picul" in East Asia for trade

Odd Volumes:

Uncommon measurements like the "drum" or "cask" occasionally find use in specific trades.

Weight Matters:

The "ton of oil equivalent (TOE)" measures energy and not volume but is vital in energy markets.

Standardization Stories:

The "m³" or cubic meters are increasingly becoming a global standard.

Historical Context:

The "hogshead" was an older unit, once used for both oil and other commodities.

Conversion Quirks:

Cords" used in the wood industry are sometimes used for estimating large oil volumes.

Eastern Influence:

The "koku" was historically used in Japan and equaled about 180 liters.

Industry Jargon:

The "tanker load" refers to specific volumes carried by tanker ships.

Uncommon Pairings:

The "tonne of oil equivalent" sometimes coexists with traditional barrel measurements.

Legal Specifications:

The "bbl/d" (barrels per day) measure the production rate, crucial in the oil industry.

Future Innovations:

Emerging measures like "standardized oil units (SOU)" could revolutionize trade measurements.