Reported Toyota Service Bulletin Cautions About Potential Motor Oil Shortage

      Caleb Jacobs

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      A potential shortage of motor oil is on the horizon. Toyota has alerted that 0W-8 and 0W-16 oils may become scarce due to issues in the petrochemical supply chain.

      Toyota has provided guidelines for substitutes. Dealers are advised to temporarily utilize thicker oils to manage the shortcomings in inventory.

      Verification of the memo. While Toyota has not confirmed the authenticity of the bulletin, it appears to be credible.

      Effect on consumers. Drivers are encouraged to schedule oil changes sooner as certain grades become less available.

      Bottom line: Toyota cautions about a possible motor oil shortage, recommending temporary substitutions to manage supply, which impacts hybrid vehicle owners and service centers.

      AI-assisted, editor-reviewed

      With the summer travel season approaching, gas prices may not be the only hurdle for those hitting the road. We could also be facing a possible shortage of specific motor oils. Although there is no current threat to the availability of retail motor oil, owners of the latest Toyota hybrids (of which there are millions) should be aware that their next oil change might differ from the usual process.

      Last month, Toyota allegedly distributed a bulletin to its service departments indicating an upcoming shortage of specific oil grades. The memo specifies that ExxonMobil anticipates ongoing shortages of 0W-8 and 0W-16 due to the state of the petrochemical market and advises dealers to use heavier oils to compensate for supply gaps.

      Toyota refers to these communications as “PANT” (Parts & Accessories News Today) bulletins. Costa Kapothanasis (@CostaKapo on X), owner of a large chain of oil change services, shared the first page of the April 30 edition, which outlines the situation clearly.

      From other PANT Bulletin instances we've discovered online, the memo seems authentic. We contacted a spokesperson from Toyota to verify its legitimacy and to confirm its recommendations. As of the time of publication, we have not received a response.

      In case the link is broken or the image is hard to read, the key section states:

      Toyota and our supplier ExxonMobil may face difficulties meeting the demand for Genuine Toyota Motor Oil (GTMO) 0W-8 and 0W-16 oils due to production and logistical constraints within the global petrochemical supply chain. While Toyota and ExxonMobil are working diligently to maintain supply, the following substitution guidelines are recommended for dealers to help address demand for the affected products. These guidelines aim to enable ExxonMobil to sustain consistent service levels for dealers and continue supporting our customers.

      TMNA recommends that dealers adhere to these substitution guidelines one day a week for 0W-8 and one day every other week for 0W-16 or apply the substitution percentages outlined below until further notice. This plan is intended to temporarily lessen demand for both oil weights and ensure a continued national supply.

      The memo further details the substitution guidelines, making it clear they are not meant to be used as long-term solutions; each is permitted only for one service interval.

      But is it safe for your vehicle? In summary, yes.

      Toyota already has protocols for substitutions in case a specific motor oil grade is unavailable. This memo is meant to help service departments manage their supplies during the shortage.

      Generally, using a higher-weight oil can lead to increased drag among components, which diminishes efficiency and converts more of the engine’s energy into heat. Lighter oils, conversely, do the opposite, but they may not sufficiently lubricate an engine if its tolerances are too loose.

      Neither option is ideal, but in some cases, a different oil weight may meet the manufacturer’s requirements for basic engine protection while possibly compromising other factors, like fuel efficiency (if too heavy) or oil consumption (if too light). Each engine has its optimal range, but “adequate” can suffice in emergencies.

      It’s clear that service shops are beginning to feel the effects. If you're due for an oil change, it might be wise to schedule it sooner rather than later. If local reports are accurate, this issue extends beyond dealers. Certain grades are already becoming hard to find at retail outlets. Kapothanasis mentions that the situation is likely to worsen:

      Just received information that Mobil and Shell have notified Costco and Walmart they will not have packaged products to supply them and to expect empty shelves in the motor oil section in a few weeks— Costa Kapothanasis (@CostaKapo) May 11, 2026

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