Standard No.:	GB/T 20420-2006
Chinese Name:	润滑剂、工业用油和相关产品（L类）-E组（内燃机油）-二冲程汽油发动机油（EGB、EGC和EGD）
English Name:	Lubricants industrial oils and related products (class L)-Family E (internal combustion engine oils)-Specifications for two-stroke-cycle gasoline engine oils (categories EGB EGC and EGD)
Professional Classification:	E34 Lubricating oil
Professional Classification:	GB National Standard
ICS Classification:	75.100
Issued by:
Issued on:	2006-07-18
Implemented on:	2007-01-01
Status:	VALID
Language:	English
File Format:	PDF
Word Count:
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Scope

This standard specifies the requirements and test methods, inspection rules and marking, packaging, transportation and storage of two-stroke oil made with the addition of multiple additives into high-viscosity base oil.

The lubricating oils, hereinafter referred to as "two-stroke oil", involved in this standard is applicable two-stroke-cycle spark-ignition gasoline engines which employ a crankcase-scavenging system and are used in transportation, leisure and utility applications such as motorcycles, snowmobiles and chainsaws.
The performance requirements of two-stroke oils classified in all of the categories covered by GB/T 7631.17 which defines the classification of internal combustion engine oils, EGB, EGC and EGD, are embraced in this standard.
2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions apply.

GB/T 260 Determination of water content in petroleum products
GB/T 261 Petroleum products; Determination of flash point; Closed cup method
GB/T 265 Petroleum Products - Determination of Kinematic Viscosity and Calculation of Dynamic Viscosity
GB/T 511 Petroleum products and additives-Determination of mechanical impurities-Gravimetric method
GB/T 2433 Petroleum products - lubricating oils and additives - determination of sulphated ash (GB/T 2433—2001, neq ISO 3987:1994)