Fuel Oil at $400-450/t: IMO Regulations Fragment the Market — HSFO, VLSFO, and Bunker Fuel Face Diverging Paths

The Regulatory Gulf: IMO 2020 Created Two Fuel Oil Markets

Since January 1, 2020, the IMO limits sulfur in marine fuel to maximum 0.50% globally and 0.10% in Emission Control Areas (ECAs) (FACT: IMO MARPOL Annex VI, 2020). This regulation created a structural bifurcation between compliant VLSFO (0.50% sulfur) and non-compliant HSFO (3.5% sulfur), which can only be burned by scrubber-fitted vessels.

Approximately 4,500 vessels are fitted with scrubbers as of 2025, representing roughly 18% of global shipping tonnage (FACT: Clarksons Research, 2026). These vessels can burn HSFO at a discount of $80-120/t versus VLSFO, creating a regulatory arbitrage that partially recovers the scrubber installation cost.

VLSFO now holds the majority of marine fuel demand at approximately 65% of the bunker market, with HSFO at 25% and LNG/liquids at 10% (FACT: Platts/S&P Global, 2026). LNG bunkering is growing rapidly but from a low base, with approximately 1,200 LNG-capable vessels in operation.

Where the Consensus Is Wrong: Fuel Oil in Power Generation Is Terminal

The consensus view suggests fuel oil demand from power generation will persist in developing economies where gas infrastructure is limited. The IEA explicitly states fuel oil is losing ground to natural gas and solar in power generation (FACT: IEA, 2025). The decline is structural, not cyclical.

In the Middle East, Saudi Arabia and Kuwait are burning more gas and less crude/fuel oil for power generation. Saudi Arabia's fuel oil used for power fell from approximately 400,000 b/d in 2019 to 200,000 b/d in 2025 (FACT: KAPSARC, 2026). Similar trends apply across the Gulf states.

In Africa and South Asia, fuel oil use for power is being displaced by solar PV, LNG imports, and hydropower, where available. Bangladesh has reduced fuel oil power generation by 50% since 2022 as LNG imports increased (FACT: Bangladesh Power Development Board, 2026). The residual fuel oil power market is shrinking by 3-5% annually.

Supply Dynamics: Refinery Configuration Determines Fuel Oil Output

Fuel oil is the bottom of the barrel product from crude distillation. Its yield depends on refinery configuration: simple hydroskimming refineries produce a higher yield of fuel oil (10-20%), while complex refineries with cokers and hydrocrackers can reduce fuel oil yield to 2-5% (FACT: EIA, 2025).

US refinery fuel oil output has declined significantly as upgrading capacity has expanded. PADD 3 (Gulf Coast) fuel oil yields fell from 8% in 2010 to approximately 3% in 2025 (FACT: EIA, 2026). The closure of simple refineries accelerates this trend.

Russia was the largest exporter of HSFO globally, but sanctions and refinery damage from Ukrainian drone strikes have reduced exports by an estimated 30% (ESTIMATE: S&P Global, 2026). Russian HSFO now flows primarily to China and India at discounted prices. The loss of Russian supply has tightened the HSFO market supporting spreads.

Regional Breakdown: The Bunker Fuel Map

Singapore (20% of global bunkering): World's largest bunker port. VLSFO at $420-450/t, HSFO at $340-370/t. Bunker demand of approximately 50 Mt annually. Key supply hub for container and tanker routes across Asia.

Rotterdam (10%): Largest European bunker port. ECAs (North Sea, Baltic) require 0.10% sulfur, increasing demand for marine gasoil (MGO) and VLSFO. LNG bunkering infrastructure is the most developed in Europe.

Fujairah (5%): Middle East bunkering hub. Growing with Mediterranean and Red Sea traffic. Increased demand as some shipping diverts from Hormuz-impacted routes. Spot premiums of $10-20/t over Singapore.

Houston/New Orleans (5%): US Gulf Coast bunker market. Low fuel oil yields from complex refineries create a supply gap filled by imports. VLSFO prices track NY Harbor ULSD with a discount.

What We Do Not Know

The IMO's next regulatory step: will the 0.50% sulfur cap be tightened to 0.10% globally? Industry groups are advocating for a 2030-35 timeline, which would accelerate the HSFO-to-VLSFO transition (ESTIMATE: IMO MEPC, 2026).

The rate of scrubber retrofitting. At current scrubber installation rates of approximately 500 vessels/year, the HSFO market share stabilizes at 25-30%. A faster pace would support HSFO demand (ESTIMATE: Clarksons, 2026).

Whether LNG and methanol will displace significant fuel oil demand. IMO's mid-term GHG regulations favor LNG/methanol/ammonia. The pace of newbuild ordering with alternative fuel capability is accelerating, but existing fleet combustion dominates.