Summary of mandatory physical and chemical specifications and limits for engine lubricating oil in Vietnam

18:47, 11/07/2024

On May 15, 2018, the Ministry of Science and Technology of Vietnam promulgated Circular 06/2018/TT-BKHCN issuing the “National technical standards for engine lubricating oil in combustion engines”.

Circular 06 stipulates the compulsory physical and chemical criteria and the limits for internal combustion engine oils in Vietnam as follows:

Criterion Name	Limit		Testing Method
Criterion Name	4-Stroke Engine Oil	2-Stroke Engine Oil	Testing Method
1. Kinematic viscosity, mm²/s (cSt)	According to the standard applied	At 100°C Not less than 6.5	TCVN 3171:2011 (ASTM D445-11) or ISO 3104:1994 or equivalent standards
2. Viscosity index, not less than	95	-	TCVN 6019:2010 (ASTM D2270-04)
3. Total base number (TBN), mg KOH, not less than	4.0	-	TCVN 3167:2008 (ASTM D2896-07a)
4. Flash point (open cup), °C, not less than	180	-	TCVN 2699:1995 or TCVN 7498:2005 (ASTM D92-02b)
5. Foaming property/stability, ml, in the second cycle, not more than	50/0	-	ASTM D892-13 or ISO 6247:1998
6. Total metal content (Ca, Mg, Zn), % by weight, not less than	0.1	-	TCVN 7866:2008 (ASTM D4951-06) or ASTM D5185-13e1 or ASTM D4628-05
7. Water content, % by volume, not more than	0.05	0.05	TCVN 2692:2007 (ASTM D95-05e1)
8. Copper strip corrosion	1a	-	TCVN 2694:2007 (ASTM D130-04e1)
9. Mechanical residue (pentane residue), % by weight, not more than	0.03	-	ASTM D4055-02
10. Sulfated ash, % by weight, not more than	-	0.18	TCVN 2689:2007 (ASTM D874-06) or ISO 3987:2010

See more related regulations in Circular 06/2018/TT-BKHCN which took effect on July 30, 2018.

- Thanh Lam -

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