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ILSAC unveils GF-8 proposal, API SQ named as next category

ILSAC unveils GF-8 proposal, API SQ named as next category

The final specifications for the next generation of International Lubricant Specification Advisory Committee (ILSAC) passenger car motor oils, ILSAC GF-7A and ILSAC GF-7B, were approved in March 2024, with a first license date of March 31, 2025. The American Petroleum Institute (API) will establish a new API “S” Service Category corresponding with the ILSAC standard.

API ā€œSā€ Service Category


At the API Lubricants Group meeting in June 2024, Darryl Purificati announced API SQ as the next service category, mirroring ILSAC GF-7 with added specifications for ultra-low viscosity oils SAE 0W-8 and SAE 0W-12. The draft of API SQ is expected by August 2024, aiming for a first license date of March 31, 2025.

ILSAC GF-8


Work on ILSAC GF-8 is already underway, with a projected first license date of March 31, 2028. This specification aims to maintain backward compatibility and will include the same viscosity grades as GF-7, excluding ultra-low viscosity grades like SAE 0W-8 and SAE 0W-12. It will incorporate ethanol fuel blends of up to 20% in key tests.

Key changes in GF-8

  • Sequence IIIH: Proposed reduction in PVIS limit from 100% to 75%.
  • Sequence IVB: Lower wear and end-of-test iron limits.
  • Sequence VJ: New test to maintain engine performance in modern TDI engines.
  • NOACK Volatility: Considering reducing the limit to 13% at 250Ā°C.

Chemical/physical properties

Sulphated Ash levels will be reduced to achieve a GPF useful life of 150,000 miles (241,401 kilometres). New bench tests and measures are being considered to improve the accuracy and relevance of the specifications.

To read the full-length article, check out the digital edition of the Q3 2024 issue of F+L Magazine.