The future of heavy-duty lubricants: decoding the API PC-12 standard

API PC-12 is rewriting the rules of Heavy Duty lubrication. Are you ready?
Discover API PC-12

Why is the heavy-duty market evolving?

Driven by the evolving demands of next-generation engines and global OEMs, and aligned with the EPA's 2027 heavy-duty engine standards, the truck and engine industries are undergoing a major shift. Modern engines will run hotter, face higher pressures, and require unprecedented levels of chemical stability.

Thermal stress

Up to +10°C higher operating temperatures. Next-generation engines (2027+) run significantly hotter to optimize combustion and reduce emissions.

Traditional oils would oxidize and thicken too fast. PC-12 delivers extreme thermal stability.

Extended durability

Zero compromise on wear. Tighter engine tolerances require a tougher oil film.

PC-12 introduces new, ultra-strict ring and liner wear tests to guarantee mechanical longevity even with thinner fluids.

Emission compliance

Protecting chemical limits. Stricter SAPS (sulfated ash, phosphorus and sulfur) control.

The oil formulation is engineered to prolong the lifespan of advanced aftertreatment systems, preventing filter clogging.

Find the right API PC-12 category for your fleet

API PC-12 splits into two categories to address the full spectrum of Heavy Duty needs : from backward-compatible protection for existing engines to ultra-low viscosity grades engineered for 2027 and beyond. Toggle below to compare.

CL-4 (PC-12A) · Heavy Protection

FB-4 (PC-12B) · Fuel Economy

CL-4(PC-12A) · Heavy Protection

Viscosity grade

Mainly 15W-40 and 10W-30

HTHS limit

> 3.5 cP (high high-temperature high-shear)

Backward compatibility

100% compatible with older engines (API CK-4, CJ-4)

Best for

Mixed fleets, severe duty cycles, construction and agricultural segments

FB-4(PC-12B) · Fuel Economy

Viscosity grade

Low (xW-30) to ultra-low viscosities like 5W-20 and 0W-20

HTHS limit

2.6 to 3.2 cP (low high-temperature high-shear)

Backward compatibility

Limited — only for 2027+ engines designed for low-viscosity fluids

Best for

Long-haul highway transport fleets looking to minimize CO₂ and fuel costs

Maximum fleet efficiency

Improved protection and performance for aftertreatment devices.

By introducing lower-viscosity alternatives under Category FB-4, the API PC-12 standard is specifically engineered to cut internal engine friction. For your fleet, this means reduced fuel consumption and a direct reduction in your carbon footprint — helping you meet both environmental targets and tight operating budgets without sacrificing engine durability.

Modern engines run hotter than ever. API PC-12 lubricants feature advanced thermal stability designed to resist oil thickening and chemical breakdown under extreme temperatures. This superior oxidation resistance ensures the oil maintains its protective properties longer, allowing you to safely reach maximum OEM-recommended drain intervals and reduce vehicle downtime.

Thinner oil does not mean less protection. API PC-12 introduces new, stringent industry tests for ring, liner and valvetrain wear. Upcoming formulations create an ultra-tough microscopic shield over critical moving parts, guaranteeing excellent mechanical longevity even under heavy loads and severe driving conditions.

Managing a mixed fleet with various vehicle generations can be a logistical challenge. Thanks to the full backward compatibility of API PC-12 Category CL-4, you will be able to upgrade your current API CK-4 oils seamlessly one single, advanced product protecting both your legacy trucks and your current fleet, simplifying workshop maintenance and preventing misapplication.

PC-12 oils support sustainability goals in two ways. First, the introduction of next-generation low-viscosity categories reduces internal engine friction, directly improving fuel efficiency and lowering CO₂ emissions. Second, their updated chemical formulations are fully compatible with advanced exhaust aftertreatment systems (such as DPFs and SCRs), ensuring long-term emissions compliance without hardware degradation.

The primary consideration is your fleet's engine mix. You will need to evaluate whether your operations require PC-12A lubricants (designed with traditional viscosity for full backward compatibility with legacy engines) or PC-12B lubricants (engineered with lower viscosity to maximize fuel economy in the newest engine models). Reviewing OEM recommendations and analyzing your current oil drain intervals are great starting points.

Preparation is key to a seamless transition ahead of the 2027 industry shift. Start by auditing your current fleet demographics and reviewing your upcoming vehicle procurement plans. Most importantly, don't hesitate to contact your local TotalEnergies technical experts, they are available to analyze your specific operational needs, help you map out a tailored lubrication strategy, and guide your workshops through every step of the transition.

The API( PC-12) specification is scheduled to officially roll out in early 2027. TotalEnergies and its technical teams are fully committed to this timeline: our next-generation heavy-duty range is being developed to be ready right from the launch of the specification, so your business can react swiftly, with no unnecessary delays, and secure the right, compliant products as the transition begins.

The next generation of Heavy-Duty performance

Our global R&D centers are currently formulating and field-testing a brand-new range of premium Heavy-Duty lubricants designed not just to meet, but to exceed the rigorous API PC-12 thresholds. By blending advanced base oils with cutting-edge additive technology, we are engineering solutions that protect your hardware today and maximize your fuel efficiency tomorrow.

The transition is coming. Don’t just react to it, lead it.

The next generation of heavy-duty performance

The transition is coming. Don't just react to it, lead it.

Our global R&D centers are currently formulating and field-testing a brand-new range of premium heavy-duty lubricants designed not just to meet, but to exceed the rigorous API PC-12 thresholds. By blending advanced base oils with cutting-edge additive technology, we are engineering solutions that protect your hardware today and maximize your fuel efficiency tomorrow.

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Understanding the API

The American Petroleum Institute (API) is the leading trade association representing all aspects of the oil and natural gas industry in the United States.

Founded in 1919, it brings together key players in the sector and works to promote technical standards, public policies that support innovation, and transparent communication on energy-related issues.

API PC-12 is rewriting the rules of Heavy Duty lubrication. Are you ready?

Why is the heavy-duty market evolving?

Thermal stress

Extended durability

Emission compliance

Find the right API PC-12 category for your fleet

CL-4(PC-12A) · Heavy Protection

Viscosity grade

HTHS limit

Backward compatibility

Best for

FB-4(PC-12B) · Fuel Economy

Viscosity grade

HTHS limit

Backward compatibility

Best for

Maximum fleet efficiency

Improved protection and performance for aftertreatment devices.

Fuel economy & lower TCO

Next-generation oxidation control

Uncompromising component protection

Optimized fleet logistics

How do PC-12 oils support emissions reduction?

What should I consider when transitioning to PC-12 oils?

How can I ensure my fleet is ready for PC-12?

When will TotalEnergies' new range be available?

The next generation of Heavy-Duty performance

The next generation of heavy-duty performance

Understanding the API

The American Petroleum Institute (API) is the leading trade association representing all aspects of the oil and natural gas industry in the United States.

Founded in 1919, it brings together key players in the sector and works to promote technical standards, public policies that support innovation, and transparent communication on energy-related issues.