• Production of Group III base stocks at the ExxonMobil Baytown, Texas Complex

• Contributes to domestic supply of high-quality Group III base stock to the North American market

• Group III base stocks slate complements ExxonMobil's portfolio of high-quality API Group I, Group II, Group IV and Group V offerings

• A further expansion of Group III production is planned for startup anticipated in 2028

Baytown, Texas – August 26, 2025

ExxonMobil is pleased to announce the introduction of its Group III base stock slate, which will include 4 and 6 cSt at 100°C base stocks to the North America market.

Produced at the Baytown Complex, this Group III slate contributes a reliable source of high-quality base stocks to the region.

In addition, the company has made a final investment decision to further expand its Group III capacity, with startup anticipated in 2028.

"This product offer expansion underscores ExxonMobil's commitment to providing a comprehensive range of base stocks that cater to the evolving needs of the market, driven by the increased diversity of engine technologies and performance requirements." said Laura Pottorf, Global Marketing Manager of ExxonMobil Basestocks & Waxes.

ExxonMobil's new offer complements the existing portfolio of high-quality API Group I, Group II, Group IV and Group V base stocks.

With the addition of Group III, ExxonMobil becomes the only supplier able to offer the full range of Group I-V base stocks to meet a wide range of customer needs.

With this investment, ExxonMobil will produce around 8,000 barrels per day of Group III base stocks.

This project represents the latest in a series of recent ExxonMobil investments in base stock production, including the Singapore Resid Upgrade Project as well as the introduction of Group II production at the Rotterdam refinery.

Click the link below to read the full press release