Spotlight
The Science Behind PC-12: Advancing Engine Oil for Modern Diesel Engines
The trucking industry is preparing for the next evolution in diesel engine oil with the development of the PC-12 engine oil category. Designed to succeed the current API CK-4 specification, PC-12 oils are being engineered to enhance oxidation performance, wear protection, and aftertreatment compatibility to meet the demands of modern diesel engines and stricter emissions regulations. But what goes into creating these next-generation engine oils, and how are they tested to ensure performance?
Performance Benefits for Modern Trucking Applications
PC-12 oils are being developed to support the latest advancements in diesel engine technology, particularly those designed to comply with the updated 2027 EPA emission standards. These standards will require an 80% reduction in tailpipe nitrous oxide (NOx) emissions and a 50% reduction in particulate matter emissions. To meet these requirements, OEMs are designing more efficient engines that often operate under increased stress and at lower oil viscosities.
With the addition of lower-viscosity formulations such as 0W-20 and 5W-20 in the PC-12 F subcategory, these oils are expected to contribute to improved fuel economy without sacrificing protection. However, this shift also demands extensive testing to ensure wear protection and oxidation stability remain uncompromised across the entire viscosity range, from 0W-20 to traditional 15W-40 oils.
Engine Durability and Protection Under Increased Demands
Modern diesel engines are evolving to be more efficient, run hotter, and operate at higher pressures, placing greater stress on engine oils. PC-12 oils are being developed with enhanced thermal and oxidative stability to withstand these extreme conditions, ensuring engine components remain protected over extended drain intervals.
Additionally, advanced anti-wear additives and friction modifiers are being formulated to minimize wear on critical engine parts, helping to extend the life of turbochargers, camshafts, and valve trains—components that experience increased loads due to higher engine efficiency and aftertreatment system integration.
Enhanced Compatibility with Aftertreatment Systems
As emission control technologies become more sophisticated, PC-12 oils will play a critical role in maintaining the efficiency and longevity of aftertreatment systems, such as diesel particulate filters (DPFs) and selective catalytic reduction (SCR) systems. These oils are being designed to reduce ash buildup and minimize deposits, helping prevent system clogging and maintaining compliance with stringent emissions regulations.
Delivering Real-World Performance for Fleets
For fleet operators and owner-operators, PC-12 engine oils are expected to offer increased reliability and efficiency. They will ensure that trucks can operate at peak performance while reducing downtime and maintenance costs. The improved oxidation stability and deposit control can help contribute to longer drain intervals and reduced oil consumption, delivering potential cost savings while supporting sustainability goals.
As the industry moves toward adopting next-generation diesel engine oils, Shell Rotella is committed to leading the way in PC-12 innovation, developing proven solutions that help protect engines, improve efficiency, and support the evolving demands of modern trucking.
Head to WhatIsPC12.com to explore the latest updates on this industry-shaping innovation. Stay informed and ahead of the game!
