Browse clear reference guides to API, ACEA, ILSAC, JASO, and vehicle manufacturer oil standards.
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For more than 75 years, API has led the development of petroleum and petrochemical equipment and operating standards. These represent the industry’s collective wisdom on everything from drill bits to environmental protection and embrace proven,...
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ACEA Engine Oil Sequences: current light-duty (2023) and heavy-duty (2024 Revision 1) categories, claim-status dates, terminology, and historical context.
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ISO 13738:2011 remains the current ISO specification for two-stroke-cycle gasoline engine oils. It defines the ISO-L-EGB, ISO-L-EGC and ISO-L-EGD categories; ISO 13738:2000 is withdrawn. The page now distinguishes these active ISO categories from their historical JASO relationships and notes the newer JASO M345:2024 revision without presenting JASO and ISO claims as automatically interchangeable.
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JASO engine-oil classifications include active two-stroke JASO M345:2024 grades FB, FC and FD; active four-stroke motorcycle JASO T903:2023 grades MA, MA1, MA2 and MB; and ultra-low-viscosity passenger-car gasoline-oil classifications under JASO M364:2025. JASO markings in the JALOS on-file system are supplier-filed performance claims, not JASO product approvals.
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ILSAC gasoline-engine-oil specifications: current GF-7A and GF-7B, the GF-6 transition through September 30, 2026, API certification marks, and historical GF categories.