Why Group III Base Oil Prices Hit a Seven-Year High
Asia-Pacific Group III base oil prices rose for a fifth consecutive week through early April 2026, reaching their highest level in more than seven years, according to Argus Media. The move traces back to a ten-day stretch in March when three refineries with significant Group III and Group III+ base oil capacity were each hit in the opening weeks of the Israel-US-Iran conflict.
Three refineries, ten days
The war began on 28 February 2026 with strikes on Iran that triggered a broader regional escalation, disrupting the Strait of Hormuz, the waterway that normally carries around a fifth of the world's seaborne oil trade. Within the following ten days, three separate attacks struck facilities that between them account for a meaningful share of the world's premium base oil supply.
Bahrain — 9 March. Bapco Energies declared force majeure across all group operations after a drone strike hit its Sitra refinery, according to Fuels and Lubes Asia and Argus Media. Sitra had just completed a USD 7.3 billion modernisation programme in 2023 that lifted capacity to 380,000 barrels a day and added significant Group III and Group III+ base oil production, making Bapco one of the world's larger Group III exporters, with more than 80% of its output normally sold overseas.
UAE — 10 March. A drone strike caused a fire in the Ruwais industrial complex, prompting ADNOC to shut the site's refining operations as a precaution, Reuters and Bloomberg reported. Ruwais is home to a dedicated base oil plant commissioned in 2016 as part of an integrated complex capable of processing up to 922,000 barrels a day, making it one of the largest single refining hubs in the Middle East.
Qatar — 18 March. An Iranian strike on the Ras Laffan Industrial City damaged one of the two processing trains at Shell's Pearl GTL plant, the world's largest gas-to-liquids facility. Shell's own statement put the repair timeline for that train at around a year. Pearl GTL converts wellhead gas into fuels including base oil alongside gasoil and kerosene, at a combined capacity of 140,000 barrels a day.
Why Group III specifically
Group I and Group II base oil supply is spread across dozens of refineries worldwide, which cushions the market against any single outage. Group III is more concentrated. A relatively small number of facilities — several of them in the Gulf — account for a large share of global capacity, built up over the past decade specifically to meet demand for higher-viscosity-index synthetic-grade lubricants. Bapco's 2023 upgrade and ADNOC's dedicated base oil plant were both built with that premium segment in mind. Losing meaningful output from two of them in the same week, alongside a shock to Qatar's GTL-derived base oil, hit a tighter part of the market than a comparable disruption to Group I or Group II supply would have.
Where things stand today
The picture six months on is more mixed than the March headlines suggested. Shipping through the Strait of Hormuz has partially recovered since a series of ceasefires and a US-Iran memorandum of understanding in mid-June, though Bloomberg reported as recently as 3 July that traffic remains well below pre-war levels and that seafarers on some vessels were still waiting to sail out of the Gulf after more than 100 days. Tolling and access disputes between Iran and Western shipowners have continued into July.
The more durable constraint for base oil buyers is not the shipping lane itself but the refinery repair timeline. Shell's own estimate of roughly a year to repair the damaged Pearl GTL train points to that capacity remaining offline into 2027, regardless of how the shipping dispute resolves. S&P Global Commodity Insights' 2026 outlook, published before the conflict, had already flagged a scheduled mid-year maintenance turnaround at a Malaysian Group III facility as a routine supply event — a reminder that even without geopolitical disruption, Group III supply runs on a tighter maintenance calendar than the broader base oil market.
For a complete dated sequence of the refinery strikes, shipping closures and diplomatic milestones that led to this price spike, see The Hormuz Base Oil Shock: A Timeline.
What this means for buyers
For procurement teams running term contracts with Gulf-origin suppliers, the practical question is less about today's spot price and more about exposure. A force majeure declaration releases the seller from delivery obligations for its duration — it does not guarantee a delivery date once lifted. Buyers with Group III specifications tied to a single Gulf origin are carrying a supply risk that a diversified sourcing base does not have.
Three things are worth doing now rather than waiting for the next spike: qualify a second origin for Group III specifications before it becomes urgent, since sample approval and OEM formulation checks typically take weeks; review existing term agreements for force majeure language and delivery guarantees; and treat current spot pricing as a data point rather than a floor, given that Group III undersupply had already been flagged as a multi-year issue before this conflict began.
Malaysia's position
Malaysia's Group III and Group III+ base oil supply is produced domestically and moves through the Strait of Malacca rather than the Gulf, which means it carries no direct exposure to the Hormuz shipping dispute or the refinery damage described above. For buyers in Vietnam, Indonesia, the Philippines and Thailand, Malaysian-origin base oil also qualifies for zero import duty under the ASEAN Trade in Goods Agreement (ATIGA) with a Form D Certificate of Origin — a standing cost advantage that holds regardless of how the Middle East situation develops.
Frequently Asked Questions
What caused the 2026 Group III base oil price spike?
Three refineries with significant Group III base oil capacity — Bapco's Sitra refinery in Bahrain, ADNOC's Ruwais complex in the UAE, and Shell's Pearl GTL plant in Qatar — were each hit by attacks within a ten-day window in March 2026, shortly after the outbreak of the Israel-US-Iran conflict. Asia-Pacific Group III prices rose for five straight weeks afterward, reaching a seven-year high by early April, according to Argus Media.
Which refineries were affected in March 2026?
Bapco's Sitra refinery in Bahrain was hit on 9 March, prompting a force majeure declaration on all group operations. ADNOC's Ruwais complex in the UAE was hit on 10 March, leading to a precautionary shutdown. Shell's Pearl GTL plant in Qatar was hit on 18 March, damaging one of its two processing trains.
How long will Group III base oil supply stay tight?
Shell has estimated roughly a year to repair the damaged Pearl GTL processing train, pointing to that capacity remaining offline into 2027. Separately, S&P Global Commodity Insights had already flagged Group III as a tighter, more maintenance-sensitive market than Group I or Group II before the conflict began.
Does the Strait of Hormuz disruption affect Malaysian-origin base oil supply?
No. Malaysian Group III and Group III+ base oil is produced domestically and shipped via the Strait of Malacca, a separate route with no exposure to the Hormuz shipping dispute. Malaysian-origin base oil also qualifies for zero import duty under ATIGA into Vietnam, Indonesia, the Philippines and Thailand with a Form D Certificate of Origin.
Sources
Argus Media; Reuters; Bloomberg; Shell Global newsroom; Bapco Energies / Fuels and Lubes Asia; S&P Global Commodity Insights; Al Jazeera; CNN.
Qualify a second Group III origin before the next spike
Sanyang Petroleum supplies Malaysian-origin Group III and Group III+ base oil into Southeast Asia, South Asia and the Middle East, with full quality documentation and ATIGA Form D where applicable.