Filing, certification and approval are different claims
A JASO on-file code records a filing under the relevant implementation system. It should not be relabelled as government approval or an OEM approval.
Reference noteKNOWLEDGE CENTRE 01
Asian Specifications Centre
JASO, Chinese standards and market-specific requirements, explained without collapsing unlike systems into one list.
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31 Jul 2026Last verified
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Curated from primary sources and checked on 31 July 2026.
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How the JASO engine-oil families differ
Motorcycle four-stroke, two-stroke and automotive diesel oils sit under different JASO standards, classifications and filing arrangements. They should never be treated as one specification ladder.
Read article →How to read Chinese lubricant standards without false cross-equivalence
A Chinese standard number identifies a specific document and status. It is not enough to describe a product simply as meeting a generic ‘China specification’.
Read article →Always record the standard year
Category letters may remain visible across revisions while tests, chemical limits, reference materials and transition dates change.
Reference noteChina VI is an emissions regime, not a universal oil category
Lubricant implications depend on engine, aftertreatment and vehicle-maker requirements. They cannot be inferred from the emissions label alone.
Reference noteMotorcycles: Four-stroke cycle gasoline engine oils
Defines MA, MA1, MA2 and MB friction classifications. The 2023 revision changed eligibility, phosphorus and evaporation requirements, reference oils and friction materials.
- Identifier
- JASO T 903:2023
- Scope
- Japan and international filing system
- Status
- Current; display effective 1 Oct 2023
Two-stroke-cycle gasoline engine oils: Classifications
Covers FB, FC and FD performance. JSAE lists the 2026 revision as current, while JALOS transition arrangements from its 2024 implementation materials remain publicly unclear.
- Identifier
- JASO M 345:2026
- Scope
- Japan
- Status
- Revised Mar 2026; filing transition not clarified
Automotive diesel engine oil standard
Defines DH-1, DH-2, DH-2F, DL-0, DL-1 and DL-2. The 2024 revision changed reference oils used in fuel-economy and valve-train-wear testing.
- Identifier
- JASO M 355:2024
- Scope
- Japan and international filing system
- Status
- Current; display effective 1 Oct 2024
Gasoline engine oils
Mandatory Chinese national standard replacing the 2006 edition. Participation by vehicle manufacturers in drafting does not constitute OEM approval for individual products.
- Identifier
- GB 11121-2025
- Scope
- China
- Status
- Mandatory; effective 1 Jul 2026
Diesel engine oils
Mandatory Chinese national standard replacing the 2006 edition. Detailed categories should be taken from the licensed standard text, not secondary summaries.
- Identifier
- GB 11122-2025
- Scope
- China
- Status
- Mandatory; effective 1 Jul 2026
China publishes new diesel-engine-oil change criteria
GB/T 7607-2026 will replace the 2010 edition when it takes effect on 1 February 2027.
Open primary source ↗New Chinese gasoline-engine-oil standard takes effect
GB 11121-2025 replaced the 2006 edition on 1 July 2026.
Open primary source ↗New Chinese diesel-engine-oil standard takes effect
GB 11122-2025 replaced the 2006 edition on 1 July 2026.
Open primary source ↗JSAE revises the JASO two-stroke test and classification series
JASO M 340, M 341, M 342, M 343 and M 345 were revised to 2026 editions. Public JALOS filing-transition details remain unresolved.
Open primary source ↗CENTRE MANDATE
Evidence before assumption.
A structured reference point for lubricant professionals working across Japan, China and international specification systems. Every future standards entry will identify its issuing body, application, status, effective date and official source.
CORE COVERAGE
- JASO motorcycle, two-stroke and diesel oils
- Chinese GB, GB/T and SH/T standards
- China VI lubricant implications
- Chinese OEM requirements
- API, ACEA and ILSAC cross-references
- Current, transitional and superseded categories
EDITORIAL PROGRAMME
What this centre will examine.
Coverage is maintained through verified explainers, comparisons, practitioner contributions and updated source registers.
JASO explained
Separate coverage of motorcycle four-stroke, two-stroke and automotive diesel classifications, including the difference between filing and government certification.
China standards register
A progressively verified register of product-specific national and industry standards, linked to the official Chinese standards platform.
Cross-reference intelligence
Comparison tables that show scope and test intent without claiming that unlike specifications are interchangeable.
PRACTICAL RESOURCES
Tools designed for disciplined decisions.
Specifications comparison framework
Filter future entries by market, application, fuel, emissions hardware, viscosity and specification family.
FRAMEWORK IN DEVELOPMENTStatus tracker
Display publication, implementation, review, replacement and withdrawal status with a last-verified date.
FRAMEWORK IN DEVELOPMENTTECHNICAL SAFEGUARDS
Boundaries that protect credibility.
- 01Use primary issuing-body sources
- 02Never infer OEM approval from laboratory similarity
- 03Show the year or edition of every standard
- 04Separate mandatory rules from recommended standards and voluntary filing systems
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