Iranian Crude Oil: Light vs. Heavy – Full Specifications, Advantages & Market Value

A comprehensive technical and commercial guide to Iran’s main crude oil grades — including API gravity, sulfur content, distillation profile, refining advantages, and global market positioning.

Introduction

Iran is one of the world’s top oil producers, with vast reserves of both light and heavy crude oil. The two main export grades are:

Iranian Light Crude (ILC) – High API, low sulfur
Iranian Heavy Crude (IHC) – Lower API, higher density

This guide provides a detailed comparison of their properties, refining yields, economic value, and competitive advantages in the global market.

1. Iranian Light Crude (ILC) – Premium Quality for High-Value Products

API Gravity: 34–36°

Sulfur Content: 0.4–0.6 wt%

Density @15°C: ~0.855 g/cm³

Key Characteristics:

Low sulfur = “sweet crude”
High volatility and distillate yield
Excellent gasoline and diesel production potential
Compatible with modern refineries (especially hydroskimming units)

Distillation Yield (Approximate):

Gasoline: 28–32%
Naphtha: 10–12%
Kerosene/Jet Fuel: 12–15%
Gas Oil (Diesel): 20–24%
Residue (VR): 18–22%

Refining Advantage: Requires less complex processing — ideal for refineries without deep conversion units.

Main Export Terminals: Kharg Island, Imam Khomeini Port

2. Iranian Heavy Crude (IHC) – High Residue Yield for Industrial Use

API Gravity: 26–28°

Sulfur Content: 1.8–2.2 wt%

Density @15°C: ~0.885 g/cm³

Key Characteristics:

Higher sulfur = “sour crude”
Lower distillate yield but high residue content
Ideal feedstock for delayed coking, visbreaking, and bitumen production
Preferred by refineries with residue upgrading capacity

Distillation Yield (Approximate):

Gasoline: 18–22%
Naphtha: 8–10%
Kerosene/Jet Fuel: 10–12%
Gas Oil (Diesel): 16–20%
Residue (VR): 30–35%

Refining Advantage: High residue yield suitable for producing vacuum bottoms, oxidized bitumen, base oil, and fuel oil.

Main Export Terminals: Kharg Island, Lavan Island

Technical Comparison: Iranian Light vs. Heavy Crude

Property	Iranian Light Crude	Iranian Heavy Crude	Global Benchmark
API Gravity	34–36°	26–28°	WTI: 39.6° Brent: 38.1°
Sulfur Content	0.4–0.6%	1.8–2.2%	WTI: 0.24% Brent: 0.37%
Density (g/cm³)	~0.855	~0.885	WTI: 0.825 Brent: 0.835
Gasoline Yield	28–32%	18–22%	WTI: ~35%
Residue (VR) Yield	18–22%	30–35%	WTI: ~15%
Refinery Suitability	Hydroskimming, Simple Refineries	Complex Refineries with Coking	Mostly simple/moderate

Key Advantages of Iranian Crude Oils

🛢️ For Buyers: Competitive Pricing

Iranian crude oils are often priced at a discount to Brent due to geopolitical factors — offering significant cost advantage, especially for long-term contracts.

🏭 For Refiners: Feedstock Flexibility

With both light and heavy grades available, buyers can blend or choose based on refinery configuration — maximizing efficiency and product slate.

🎯 High-Quality Residue for Downstream Industries

Iranian Heavy Crude produces excellent vacuum residue — ideal for manufacturing oxidized bitumen, base oil, and industrial fuels.

Who Should Buy Which Crude?

✅ Buy Iranian Light if:

You operate a simple or hydroskimming refinery
You need high gasoline/diesel yield
Your desulfurization capacity is limited
You want cleaner combustion products

✅ Buy Iranian Heavy if:

You have coking or visbreaking units
You produce bitumen, base oil, or fuel oil
You can handle higher sulfur with gas treatment
You seek lower-cost feedstock with high residue output

Real-World Usage Examples

Indian Refinery: Blends Iranian Light with local crude to increase gasoline yield — meets growing domestic demand.
Chinese Petrochemical Plant: Uses Iranian Heavy residue to produce high-quality oxidized bitumen for road projects.
African Fuel Producer: Converts Iranian Heavy into low-sulfur fuel oil after desulfurization — supplies power plants.
European Trader: Arbitrages between Iranian Heavy and European fuel oil prices — captures margin in backwardated markets.

Frequently Asked Questions

Q: Is Iranian crude still available under sanctions?
A: Yes — many countries continue to import Iranian crude through alternative payment and shipping mechanisms. We ensure full compliance with trade regulations.

Q: Can I get sample analysis before purchase?
A: Yes — we provide recent test reports from independent labs (SGS, Intertek) for every shipment.

Q: What are the delivery terms?
A: FOB Kharg Island, CFR to major ports. Flexible Incoterms based on buyer’s request.

Q: How stable is the supply?
A: Iran has large reserves and consistent production capacity — reliable monthly supply available for long-term contracts.

Q: Do you offer blending services?
A: Yes — we can assist with blending advice or arrange cargo mixing upon request.

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