Clair
--
--
- Class
- Medium/Sweet
- API
- 25°
- Sulfur
- 0.4%
Crude grade comparison
Clair vs Isthmus
VS
Clair – Isthmus spread
-- · Clair premium
Isthmus
--
--
- Class
- Medium/Sweet
- API
- 33.6°
- Sulfur
- 1.3%
Clair is medium/sweet crude (25° API, 0.4% sulfur); Isthmus is medium/sweet crude (33.6° API, 1.3% sulfur).
Crude quality
Quality & refinery yields
How the two crudes differ in the barrel. Each property uses its own scale.
- Clair Crude
- Isthmus Crude
Physical & chemical properties
API gravityhigher = lighter
C25°
I33.6°
Sulfur contenthigher = sourer
C0.4%
I1.3%
Densityhigher = heavier
C g/cm³
I g/cm³
Viscosityhigher = thicker
C cSt
I cSt
Pour pointhigher = waxier
C °C
I °C
Typical refinery yields
Gasoline% of barrel
Diesel% of barrel
Jet fuel% of barrel
Residual fuel% of barrel
Bars show each yield range; the faint part runs from 0 to the low end. Scale 0–50%.
Full specification comparison
| Property | Clair Crude | Isthmus Crude | Clair − Isthmus |
|---|---|---|---|
| Classification | |||
| Classification | Medium/Sweet | Medium/Sweet | |
| Origin | Clair field, West of Shetland | Isthmus of Tehuantepec, southern Mexico | |
| Chemical properties | |||
| API gravity | 25° API | 33.6° API | -8.6 °API |
| Sulfur content | 0.4% | 1.3% | -0.9% |
| Density | g/cm³ | g/cm³ | 0 g/cm³ |
| Pour point | °C | °C | 0 °C |
| Viscosity | cSt | cSt | 0 cSt |
| Typical refinery yields | |||
| Gasoline | % | % | 0 pts |
| Diesel | % | % | 0 pts |
| Jet fuel | % | % | 0 pts |
| Residual fuel | % | % | 0 pts |
| Trading & logistics | |||
| Delivery basis | FOB | FOB | |
| Major exchanges | |||
| Export hub | North Sea/Sullom Voe area | Coatzacoalcos/Dos Bocas | |
| Main destinations | Northwest Europe | US Gulf Coast | |
| Benchmark type | Mexican export benchmark grade | ||
| Market profile | |||
| Key characteristics | Medium-gravity, waxy West of Shetland crude | Medium-light Mexican export blend | |
| Refining notes | Regional refining feedstock | Regional refining feedstock | |
FAQ
Clair vs Isthmus questions
The spread, the quality gap and why each grade is a benchmark.
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Clair Crude was $ and Isthmus Crude $ per barrel, so Isthmus traded at a premium of $0 over Clair. Over the previous 30 shared price days the spread averaged -- $/bbl, with Isthmus priced above Clair on 0 day(s).
Clair Crude is a medium/sweet Clair field, West of Shetland crude (25° API, 0.4% sulfur) and benchmark. Isthmus Crude is a medium/sweet Isthmus of Tehuantepec, southern Mexico crude (33.6° API, 1.3% sulfur) and Mexican export benchmark grade benchmark.