The continuous evolution of automotive technology brings increasing changes to engine oils. Stricter emission regulations, advancements in engine design, and the pursuit of better fuel economy pushes Q8Oils to innovate constantly.
At the core of these advancements is the American Petroleum Institute (API), which plays a leading role in developing service categories that define performance standards for engine oils. In March 2025, API introduced the API SQ service category. This new category continues on the foundation laid by API SP, introducing several technical enhancements to better align with the needs of modern, fuel-efficient, and environmentally friendly vehicles.
What Makes API SQ Different?
API SQ represents a leap forward, integrating new key improvements over API SP, which include:
- Support for Ultra-Low Viscosity Grades
API SQ accommodates SAE 0W-8 and SAE 0W-12 viscosity grades, which were previously excluded under API SP. These ultra-low viscosity oils are engineered to minimize hydrodynamic friction, improving fuel economy without compromising engine protection. This advancement reflects the industry’s move towards thinner oils that enable engines to operate more efficiently, especially during cold starts and stop-and-go driving.
- Stricter Sulfated Ash Limits
The new specification limits sulfated ash content to a maximum of 0.9% by mass. This is critical for safeguarding gasoline particulate filters (GPFs), which can become clogged by ash accumulation. By protecting the aftertreatment system, API SQ oils help ensure optimal exhaust flow, reduced emissions, and extended component life.
- Better Engine Testing Protocols
To ensure superior performance under real-world conditions, API SQ introduces updated and more rigorous engine tests:
- Sequence IIIH Test: Validates high-temperature oxidation stability and deposit control, ensuring oils can endure extreme thermal stress.
- Sequence VH Test: Measures the oil’s ability to manage sludge and varnish at lower temperatures, maintaining engine cleanliness.
- Sequence VI Test: Evaluates the lubricant’s contribution to fuel economy, verifying its role in reducing internal engine friction.
Advantages over API SP
- Improved Fuel Economy: The support for ultra-low viscosity grades results in lower energy losses, translating to better fuel efficiency and reduced greenhouse gas emissions.
- Better Emissions System Protection: With reduced sulfated ash content, API SQ oils minimize the risk of GPF blockages, supporting compliance with stricter global emission standards.
- Superior Engine Cleanliness and Durability: Enhanced testing ensures better protection against sludge, varnish, and deposits, which contributes to longer engine life and consistent performance across oil change intervals.
Q8Oils and API SQ: The Next Step for Engine Lubricants
In response to API’s introduction of SQ, Q8Oils has proactively upgraded two of its products—Q8 Formula Elite C2/C3 5W-30 and Q8 Formula Special FE 0W-20—to align with the new specification. These oils are specifically formulated to meet the demands of API SQ, ensuring users receive the best performance benefits.
Q8 Formula Elite C2/C3 5W-30
- Designed for Modern Engines: Tailored for vehicles equipped with advanced emission control systems such as GPFs, offering excellent protection and long-term durability.
- Latest Additive Technology: Reduces sulfated ash formation, supporting cleaner exhaust systems and improved emissions compliance.
- Exceptional Oxidation Stability: Maintains viscosity and resists oil thickening even under severe driving conditions, helping to extend oil drain intervals and reduce operational costs.
Q8 Formula Special FE 0W-20
- Ultra-Low Viscosity Performance: Specifically engineered to optimize fuel economy by reducing friction while maintaining critical engine protection.
- Enhanced Wear Protection: Despite its lower viscosity, this oil ensures robust wear control, supporting engine longevity.
- Emission System Compatibility: Incorporates advanced additive systems to minimize sulfated ash, protecting sensitive aftertreatment components.
Conclusion
API SQ represents a new standard in engine oil performance, directly addressing the evolving needs of modern engines and stricter emission norms. Q8Oils’ updated products—Q8 Formula Elite C2/C3 5W-30 and Q8 Formula Special FE 0W-20—are perfectly positioned to deliver the benefits promised by API SQ. By combining advanced formulation technologies with rigorous performance validation, Q8Oils continues to provide solutions that not only protect engines but also help achieve fuel economy goals and meet global sustainability targets.
