Mobil Delvac Prepares for the Next Generation of Heavy-Duty Engine Oils with PC-12
Mobil Delvac is preparing for the upcoming PC-12 upgrade for heavy-duty diesel engine oils as increasingly stringent emissions requirements drive changes in engine and lubricant technology. According to Mobil’s official PC-12 information, the first anticipated licensing date is January 1, 2027, aligning with the introduction of model-year 2027 engines in the United States. Mobil Delvac is actively testing and developing PC-12 lubricants in cooperation with OEM partners and other industry stakeholders. The new category is being developed in two directions: PC-12A, intended to provide backward c
The U.S. heavy-duty diesel market is entering another stage of technology development. As more stringent emissions requirements approach for 2027, engine manufacturers are developing new powertrain technologies that require lubricants capable of supporting lower viscosities, higher efficiency and demanding durability requirements. Mobil Delvac describes PC-12 as the next major category upgrade for heavy-duty diesel engine oils and notes that its development involves the U.S. Environmental Protection Agency, California Air Resources Board, lubricant suppliers and OEM manufacturers.
Mobil Delvac is actively testing and developing PC-12 products and has identified two product directions. PC-12A, also referred to as CL-4, is intended to provide backward compatibility for established equipment, while PC-12B, or FB-4, is designed to support the latest generation of engines and technologies. Mobil currently anticipates January 1, 2027 as the first licensing date for PC-12, aligning with the introduction of model-year 2027 engines in the United States.
Mobil Delvac is also introducing products intended to help fleets prepare for the upcoming category transition. The company currently highlights Mobil Delvac Ultra 0W-20 Max Fuel Saver as a new lubricant developed with the future PC-12 requirements in mind. The product focuses on low-viscosity performance, fuel-economy potential, cold-start protection, low-temperature flow and oxidation performance. For fleet operators, understanding the PC-12 transition in advance can help support lubricant selection and maintenance planning as next-generation heavy-duty engines enter service.
