{"organism":"Page","children":[{"organism":"Container.Raw","children":[{"organism":"Metadata","model":{"title":"The science behind engine oil specifications.","text":"The trucking industry is preparing for the next evolution in diesel engine oil with the development of the PC-12 engine oil category.","links":[{"name":"The science behind engine oil specifications.","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications.html"}]},"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/metadata"},{"organism":"ContentOwner","model":{},"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/contentowner"},{"organism":"Container.Header","children":[{"organism":"Container.Raw","ref":"https://rotella.shell.com/en_us/_jcr_content/root/header/inherited.model.json","id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/header/inherited","model":{}},{"organism":"Breadcrumb","model":{"links":[{"name":"Inside Shell Rotella®","value":"https://rotella.shell.com/"},{"name":"Info Hub","value":"https://rotella.shell.com/en_us/info-hub.html"},{"name":"Specs & Technical Standards For Diesel Oil","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards.html"},{"name":"What is PC-12? | Proposed Oil Standard & Benefits","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12.html"},{"name":"The science behind engine oil specifications.","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications.html"}]},"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/header/breadcrumb"}],"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/header","model":{}},{"organism":"Container.Main","children":[{"organism":"Container.Section","children":[{"organism":"PageHeader","color":"inherited","model":{"title":"The Science Behind PC-12: Advancing Engine Oil for Modern Diesel Engines"},"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/main/section/page_header"},{"organism":"PromoSimple.Text","color":"inherited","id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/main/section/text","model":{"text":"\u003Cp\u003EThe trucking industry is preparing for the next evolution in diesel engine oil with the development of the \u003Ca href=\"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12.html\" target=\"_self\" rel=\"noopener noreferrer\"\u003EPC-12 engine oil category\u003C/a\u003E. 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?\u003C/p\u003E\r\n\u003Cp\u003E\u003Cb\u003EPerformance Benefits for Modern Trucking Applications\u003C/b\u003E\u003C/p\u003E\r\n\u003Cp\u003EPC-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.\u003C/p\u003E\r\n\u003Cp\u003EWith the addition of lower-viscosity formulations such as 0W-20 and 5W-20 in the PC-12B 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.\u003C/p\u003E\r\n\u003Cp\u003E\u003Cb\u003EEngine Durability and Protection Under Increased Demands\u003C/b\u003E\u003C/p\u003E\r\n\u003Cp\u003EModern 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.\u003C/p\u003E\r\n\u003Cp\u003EAdditionally, 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.\u003C/p\u003E\r\n\u003Cp\u003E\u003Cb\u003EEnhanced Compatibility with Aftertreatment Systems\u003C/b\u003E\u003C/p\u003E\r\n\u003Cp\u003EAs emission control technologies become more sophisticated, \u003Ca href=\"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/additives-at-the-core-of-api-pc-12-oils.html\" target=\"_self\" rel=\"noopener noreferrer\"\u003EPC-12 oils will play a critical role\u003C/a\u003E 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.\u003C/p\u003E\r\n\u003Cp\u003E\u003Cb\u003EDelivering Real-World Performance for Fleets\u003C/b\u003E\u003C/p\u003E\r\n\u003Cp\u003EFor 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, potentially delivering improved total cost of ownership (TCO), while supporting sustainability goals.\u003C/p\u003E\r\n\u003Cp\u003EAs the industry moves toward adopting next-generation diesel engine oils, Shell Rotella is committed to leading the way in \u003Ca href=\"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/technology-demonstration-and-field-trials.html\"\u003EPC-12 innovation\u003C/a\u003E, developing proven solutions that help protect engines, improve efficiency, and support the evolving demands of modern trucking.\u003C/p\u003E\r\n"}}],"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/main/section","model":{}}],"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/main","model":{}},{"organism":"Container.Footer","children":[{"organism":"Breadcrumb.Large","model":{"links":[{"name":"Inside Shell Rotella®","value":"https://rotella.shell.com/"},{"name":"Info Hub","value":"https://rotella.shell.com/en_us/info-hub.html"},{"name":"Specs & Technical Standards For Diesel Oil","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards.html"},{"name":"What is PC-12? | Proposed Oil Standard & Benefits","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12.html"},{"name":"The science behind engine oil specifications.","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications.html"}]},"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/footer/breadcrumb"},{"organism":"Container.Raw","ref":"https://rotella.shell.com/en_us/info-hub/_jcr_content/root/footer/inherited.model.json","id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/footer/inherited","model":{}}],"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content/root/footer","model":{}}],"id":"/conf/shell/settings/wcm/templates/base/structure/jcr_content/root","model":{}}],"model":{"title":"The science behind engine oil specifications.","text":"The trucking industry is preparing for the next evolution in diesel engine oil with the development of the PC-12 engine oil category.","links":[{"name":"canonical","value":"https://rotella.shell.com/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications.html"},{"name":"errorUrl","value":"https://rotella.shell.com/en_us/error.html"},{"name":"hierarchy","value":"en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications"},{"name":"homeTitle","value":"Shell Rotella®"},{"name":"homeUrl","value":"https://rotella.shell.com/"},{"name":"locale","value":"en-US"},{"name":"title","value":"The science behind engine oil specifications. | Shell Rotella®"},{"name":"textDirection","value":"ltr"},{"name":"template","value":"base"},{"name":"contentPath","value":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications"},{"name":"externalDisclaimerText"},{"name":"themeMode"},{"name":"lastModified","value":"2026-07-02T17:17:33.855Z"},{"name":"themeName","value":"base"},{"name":"themePath","value":"/etc.clientlibs/amidala/clientlibs/theme-base"},{"name":"themeCss","value":"/etc.clientlibs/amidala/clientlibs/theme-base.ACSHASHb291465fc8d3c7bcefde74d34044b698.css"}]},"id":"/content/shell/business/rotella/en_us/info-hub/diesel-oil-specs-tech-standards/pc-12/the-science-behind-engine-oil-specifications/jcr_content"}