r/Shortages

The crude oil shortage is the main headline. Gasoline, diesel, jet fuel. But there is a downstream supply chain that is about to hit most car owners in America.

The AutoZone Memo

A leaked internal AutoZone memo is circulating, warning that the U.S. is facing "the largest supply shortage of lubricating fluids in the modern history of America" with "average available supply in this product category to drop by 40%."

Is the memo authentic? AutoZone corporate has not confirmed it. Carscoops reached out and received no reply as of May 15. But the data inside it is consistent with what multiple independent sources are reporting: JobbersWorld (the lubricant industry's primary trade publication), the Independent Lubricant Manufacturers Association (ILMA), ICIS, Shell's own public statements, and confirmed internal memos from Nissan and Toyota.

Nissan: 45% Allocation Cut, Confirmed

Nissan drafted an internal bulletin obtained by The Drive and confirmed as authentic by a Nissan spokesperson. The bulletin laid out a hard number: allocation of Nissan Genuine Oil (including Mobil and Mobil 1 variants) capped at 55% of prior-year volumes. A 45% cut. Effective May 1, 2026.

The bulletin includes draft customer talking points. The "why" section states the shortage affects all automakers, not just Nissan. From The Drive's reporting, the full text reads:

"We are writing to provide an important update regarding the availability of engine oil products across the Nissan network in the U.S. Due to ongoing global supply constraints impacting key raw materials and refining inputs due to the Middle East Conflict, we have been advised of reduced production capacity for most lubricant products. As a result, Nissan will be implementing the following adjustments, effective May 1, 2026. Allocation of Nissan Genuine Oil (including Mobil and Mobil 1 variants) will be constrained and managed at a 55% YoY level based on gallons purchased."

The Nissan spokesperson told The Drive that while the bulletin is real, it was never distributed to Nissan's dealer network. The May 1 effective date has come and gone without the memo being sent.

Source: The Drive, "Second Automaker Sounds Alarm Over Dwindling Motor Oil Stock [UPDATE]" (May 14, 2026)

Toyota: Substitution Guidelines, Unconfirmed

The Drive reported on May 14 that Toyota may have sent a service bulletin warning of a shortage of 0W-8 and 0W-16 oils. The bulletin, allegedly from Toyota and its supplier ExxonMobil, instructs dealers to use substitution guidelines, substituting heavier oil weights one day per week for 0W-8 and one day every other week for 0W-16.

Toyota has not confirmed the bulletin's authenticity. The Drive reached out to a Toyota spokesperson; as of publication time, Toyota had not responded. Based on comparisons to other known Toyota bulletins, The Drive assessed the document appears genuine. The substitutions are allowed for one service interval only, not a permanent fix.

Two of the world's largest automakers drafting rationing plans within days of each other is not a coincidence. It is a supply chain signal.

Source: The Drive, "Alleged Toyota Service Bulletin Warns of Looming Motor Oil Shortage" (May 14, 2026)

Why Motor Oil Specifically?

Motor oil is not pumped out of the ground and poured into a bottle. Modern synthetic passenger car motor oils (the kind required by nearly every car built in the last 15 years) require high purity Group III base oils. Group III base oils are the raw ingredient that makes synthetic oil synthetic.

The United States is a net importer of Group III base oils. Domestic production covers only 30% to 50% of demand.

JobbersWorld reported in March 2026, using U.S. Census Bureau and Global Trade Tracker data, that Middle Eastern sources (primarily Qatar, the UAE, and Bahrain) supplied more than 40% of total U.S. Group III supply for three consecutive years. In January 2026, that share climbed to approximately 55%.

Virtually all of these volumes must physically transit the Strait of Hormuz. The Strait has been functionally closed to commercial transit since February 28.

The AutoZone memo's 40% figure is not an estimate. It is a direct reflection of losing the specific import channel the U.S. depends on for modern synthetic oil.

The Pearl GTL Strike

Shell's Pearl gas to liquids (GTL) plant in Qatar's Ras Laffan Industrial City was struck by Iranian missiles on March 19, 2026. Shell confirmed the damage in a public statement: "no damage to train one and an initial assessment of around one year for full repair of train two."

Pearl GTL is one of the world's largest sources of premium Group III+ base oils, with the capacity to produce about 30,000 barrels of base oil per day, enough to fill 225 million cars per year, according to Shell's own website. One of two production trains was damaged. Shell's own estimate: approximately one year for full repair.

This is the plant that produces the base oil for Pennzoil's synthetic line made from natural gas. It produces base oil for Mobil 1 formulations. It is offline, and it is not coming back until mid-2027 at best.

Sources: Shell Plc public statement (March 2026); shell.com.qa, "GTL Products"

What "Synthetic" Actually Means

A dirty secret of the motor oil industry: in the United States, "synthetic" is a marketing term, not a chemical classification. Most oils sold as "full synthetic" are Group III base stocks refined from crude oil. ExxonMobil itself states: "There is no generally accepted definition of a synthetic base stock, or synthetic base oil. In the U.S., the government considers 'synthetic' to be a marketing term." And: "Most Group III base stocks are refined from crude oil streams."

This matters because if your car requires synthetic oil (and most modern turbocharged engines do), you cannot just substitute conventional. And the crude refining chain that produces Group III base oils is the same chain being squeezed by the Strait of Hormuz closure.

Not all Group III is interchangeable either. Group III+ grades used in 0W-20 and 0W-16 formulations (the weights specified by most new cars) have even fewer alternative sources. JobbersWorld's April 29 analysis identified these low-viscosity products as the single biggest point of exposure.

Source: ExxonMobil base stocks FAQ (via The Drive, May 14, 2026)

The ILMA / GM Dexos Fight

The Independent Lubricant Manufacturers Association formally requested that General Motors grant temporary flexibility under its dexos engine oil licensing program so blenders could use alternative base oils during the shortage. GM refused.

GM's position: no enforcement pause. License terminations will continue. Blenders have approximately one month of forward inventory. After that, companies without approved alternatives face "serious commercial and licensing risk, including potential termination."

Translation: the blenders who make the oil that goes into GM vehicles are being told by GM that if they cannot source Group III base oil to the exact dexos specification, they lose their license and cannot sell dexos-approved oil. Meanwhile, the Group III base oil physically does not exist on the spot market.

ILMA CEO Holly Alfano, from the ILMA website (April 3, 2026): "ILMA appreciates GM's response; however, we remain concerned by the OEM's decision not to provide temporary enforcement flexibility under these extraordinary circumstances."

Source: ILMA.org, "GM Responds to ILMA's Dexos Licensing Relief Request" (April 3, 2026)

Current Market Conditions

From JobbersWorld, March 24, 2026, and confirmed by Axios on May 15, 2026:

Spot availability for Group III base oils has "largely disappeared." Unless you have strong existing supply contracts, "you're not going to find it." Prices are escalating in what blenders describe as an "unstructured, less predictable manner." Some estimates put Group III prices approaching $2.00 per gallon above pre-crisis levels.

ICIS global lead for base oils Amanda Hay, speaking to Axios on May 15: "Actual shortages are starting to appear" for some synthetic oil products. "Security of supply is the chief concern for industry players."

Note: JobbersWorld is behind a paywall and cannot be independently accessed without a subscription. The Axios quotes were accessed on May 16, 2026 but cannot be re-verified in real time.

The Timeline: Worse Than Crude

Here is the critical distinction most people miss. Crude oil is a commodity. Group III base oils are a specialty refined product from specific plants.

JobbersWorld's April 8 analysis: even if the Strait of Hormuz reopens tomorrow, Group III relief "may take much longer" than crude relief. The market will bifurcate. Group I and II (conventional oils, industrial lubricants) will see faster relief. Group III and Group III+ will remain tight and expensive for months after any geopolitical resolution.

Why? Because Pearl GTL is physically damaged and takes a year to repair. Because supply chains for specialty base oils do not just snap back when tankers start moving again. Because blenders carrying one month of inventory will take months to restock the entire distribution chain.

The lubricant industry's traditional pricing playbook, built around predictable cost adjustments and long lag times, has broken. The market has shifted to what blenders describe as an "all-in" approach where simply securing supply is the dominant factor. Price is secondary.

What This Means For You

If you drive a modern car that requires synthetic oil (basically anything with a turbo, direct injection, or a 0W viscosity rating), here is where this lands:

Your next oil change is going to cost more. Possibly a lot more.
Your dealer or independent shop may not have your exact oil weight in stock. They may offer you an alternative that "meets spec" but was not what your engine was designed for.
If you are due for an oil change in the next month or two, do it now. The supply has not collapsed yet, but two automakers and the largest auto parts retailer in America are clearly preparing for exactly that.
This is not a "gas prices are high" problem. Gas prices can spike and then come back. Motor oil is a manufactured product from damaged and offline facilities with no short-term replacement. The timeline is months, not weeks.

Personal Note: First off I like to thank everyone for their comments made on my last oil post. This is a shortened post, it cannot factor in every possible scenario. I cannot tell the future, no one can. I am not making a prediction, do not ask me for one. I do not give financial advice, please don’t ask. I am working on region specific posts to go more into detail how bad this situation will be, because it depends on where you live. I am focusing on the area most at risk first, south east Asia, subsaharan Africa, Latin America. After that I will go on to wealthy Asian countries, Australia, Europe, and the U.S.. Linked below is my previous post. Thank you for reading, and take care.

https://www.reddit.com/r/oil/s/STKrSiDtjW

Edit: Adding a potential timeline. This is speculation, I cited sources. I made sure that I used all available information that I could, including checking current prices for motor oil, and oil changes (U.S.)

A 5-quart jug of Mobil 1 5W-30 still costs $26 at Walmart (Slickdeals, May 7). That's pre-crisis normal. It won't last.

Upstream, the market is broken. Independent shops now pay $25/gallon wholesale for 0W-20 synthetic, triple the February price (The Drive, May 15). It just hasn't reached the shelf yet. Argus Media told CNBC on May 1 that stocks will "run dry in a month" if nothing comes in. That clock points to early June.

Three paths from here, all subject to change as conditions shift:

Best: Hormuz reopens soon. Prices settle 20-40% above normal by late summer. Shelves stay stocked. Disruption is an annoyance, not a crisis.

Base: Hormuz stays shut through summer. Retail shortages start mid to late June, first in 0W-16 and 0W-20 synthetic. Broader gaps by August. Oil changes push past $150. This is the current trajectory.

Worst: Hormuz stays shut and a hurricane hits the Gulf Coast. ILMA warns a single storm could knock out 30-40% of US Group II production on top of the 44% Group III already lost. Shelves go bare. Oil changes hit $200+. Recovery stretches into 2027.

The Gulf Coast is best protected (refineries and ports are there). The West Coast and rural areas are most exposed. But the real divide is store size, not region. Walmart and AutoZone have national contracts and get priority allocation. Your local independent shop is bidding on whatever base oil is left on the spot market.

None of this is set in stone. If Hormuz reopens, the timeline shifts. If new supply routes emerge, the math changes. What's written here is the picture as of mid-May 2026 based on what blenders, distributors, automakers, and industry groups are saying publicly.

Sources: CNBC (May 1), The Drive (May 13-15), ILMA (May 11), Argus Media, Slickdeals (May 7), Carscoops (May 15), JobbersWorld (March-April 2026).

Sources

The Drive: "Second Automaker Sounds Alarm Over Dwindling Motor Oil Stock [UPDATE]" (May 14, 2026) Nissan bulletin confirmed authentic by Nissan spokesperson, 45% allocation cut at 55% of prior-year volumes, effective May 1, never distributed to dealers
The Drive: "Alleged Toyota Service Bulletin Warns of Looming Motor Oil Shortage" (May 14, 2026) Toyota bulletin unconfirmed by Toyota, substitution guidelines for 0W-8 and 0W-16, not a permanent fix
Carscoops: "AutoZone's Alleged Memo On Motor Oil Supply Is Ugly" (May 15, 2026) leaked memo, 40% supply drop, AutoZone did not respond to request for comment
Shell Plc: "Impact of Middle East conflict on Shell activities" (March 2026) confirms train two damage, ~1 year repair timeline, train one undamaged
Shell.com.qa: "GTL Products" 30,000 bpd base oil capacity, enough for 225 million cars per year
ILMA.org: "GM Responds to ILMA's Dexos Licensing Relief Request" (April 3, 2026) GM refuses enforcement flexibility, Holly Alfano statement
ExxonMobil base stocks FAQ (via The Drive) confirms "synthetic" is a U.S. marketing term, Group III refined from crude oil streams
JobbersWorld: "Group III Tightens as Prices Surge and Supply Constraints Deepen" (March 24, 2026) U.S. Census Bureau / Global Trade Tracker import data, spot availability "largely disappeared"
JobbersWorld: "After the Ceasefire: Hope for Lower Crude, But Group III Relief May Take Much Longer" (April 8, 2026) bifurcated recovery timeline
JobbersWorld: "Where Group III Actually Matters: A Practical Framework for Managing Lubricant Supply Risk" (April 29, 2026) Group III+ low-viscosity products identified as biggest exposure point
Axios: "Motor oil shortages are starting to appear amid Middle East disruptions" (May 15, 2026) ILMA, ICIS comments, Amanda Hay quote (behind Cloudflare, accessed May 16)

What should we do to prepare if there is an oil shock? How can we ride it out or prepare for it as best as possible?

The last pre-war shipments of oil products from the Strait of Hormuz have arrived at their destinations as of early May, meaning the promise of an energy crisis as a result of the Iran war is fast approaching. Leading experts are now forecasting energy disruptions ranging from rationing to severe shortages in import-dependent economies, with roughly 11% of global oil supply already offline. This leaves us with the question: even if this war were to end today, what sort of system-wide effects are locked in given the current loss in production, and what will be required of us to cope with the fallout?

In this episode, Nate welcomes back petroleum geologist Art Berman to break down the timeline of the looming oil shortages stemming from the Strait of Hormuz crisis and just how severe they could become within a tightly coupled, complex global system. Art explains why, even if the war were to end today, the inherent lags in our industrial supply chains mean shortfalls are already baked into the coming months. The resulting rise in energy prices will reach far beyond the pump, rippling out into the cost of virtually everything and confronting much of the world with conditions not seen in over five decades. Ultimately, Art sees this as a forcing mechanism that could compress decades of needed adjustment into months. The outcome will rely less on policy than on whether societies can absorb the shock without breaking.

Amid all the speculation about oil prices in the wake of the Iranian conflict, what do these numbers actually mean in physical terms? If this conflict signals the beginning of a long-term decline in energy availability, are we already past the peak of the global material economy, with the financial layer not yet caught up to the physics? And if this conflict signals the beginning of a long-term decline in energy availability, what lessons from our deep past might help us find our way forward?

Art Berman is a petroleum geologist with over 40 years of oil and gas industry experience. He is an expert on U.S. shale plays and is currently consulting for several E&P companies and capital groups in the energy sector.