This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Engine Oil Viscosity Classification
- Ground Vehicle Standard
- J300_201304
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Standard defines the limits for a classification of engine lubricating oils in rheological terms only. Other oil characteristics are not considered or included.
Rationale
This revision begins the process of extending the SAE Engine Oil Viscosity Classification system to lower high-temperature high-shear-rate (HTHS) viscosities by adding a new high-temperature viscosity grade – SAE 16 (>2.3 mPa·s HTHS) – to SAE J300. In addition, the minimum 100 °C kinematic viscosity (KV100) of the SAE 20 grade is raised from 5.6 mm2/s to 6.9 mm2/s. A formal request for this new grade was presented to the Engine Oil Viscosity Classification Task Force (EOVC) by the International Lubricant Standardization Advisory Committee (ILSAC) on September 21, 2011 as well as on earlier occasions by a number of individual original equipment manufacturers and oil companies. The benefit of establishing a new viscosity grade is to provide a framework for formulating lower HTHS viscosity engine oils in support of the ongoing quest of engine builders to improve fuel economy.
The minimum KV100 of the SAE 20 grade is increased from 5.6 mm2/s to 6.9 mm2/s for two reasons: (1) equipment manufacturers desire to narrow this range to ensure proper operation of hydraulically-actuated engine control devices which are sensitive to kinematic viscosity and (2) the lower portion of the KV100 range is not being utilized and is outside of the formulating range of oils with HTHS viscosity > 2.6 mPa·s. The new minimum value of 6.9 mm2/s was selected to provide the same KV100 range as a fraction of the minimum KV100 of the SAE 20 grade {(9.3-6.9)/6.9 = 0.35} as the current SAE 30 grade {(12.5-9.3)/9.3 = 0.34}. Raising the minimum KV100 is not expected to impact commercial SAE XW-20 lubricants in the marketplace.
The KV100 range of the SAE 16 grade overlaps that of the SAE 20 grade. This represents an historical departure from non-overlapping KV100 ranges in SAE J300. Allowing overlapping of these two grades was done to provide adequate formulating space for the new grade. Assignment of a single high-temperature viscosity grade to an engine oil with KV100 in the overlap region (6.9 – 8.2 mm2/s) is covered in Section 6 of this document.
Recommended Content
Ground Vehicle Standard | Engine Oil Viscosity Classification |
Aerospace Standard | Lubricating Characteristics and Typical Properties of Lubricants Used in Aviation Propulsion and Drive Systems |
Aerospace Material Specification | Lubricant, Instrument Bearing, Petroleum Base Viscosity 35 |
Topic
Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 | ||
TABLE 1 | SAE VISCOSITY GRADES FOR ENGINE OILS |
Issuing Committee
Fuels and Lubricants TC 1 Engine Lubrication
The Fuels and Lubricants Council is responsible for: setting policy; providing final approval of documents; arbitrating controversial issues; reporting to the Technical Board (via the Technology/Development Group); approving the Technical Committee membership; and appointing Technical Committee, Coordinating Committee, and other Chairpersons as required. Participants in the SAE Fuels and Lubricants Council include OEMs, suppliers, consulting firms, government and other interested parties.
Reference
* Redlines comparisons are available for those standards
listed in the Revision History that contain a radio button. A
redline comparison of the current version against a revision is
accomplished by selecting the radio button next to the standard and
then selecting 'compare'. At this time, Redline versions only exist
for some AMS standards. SAE will continue to add redline versioning
with ongoing updates to SAE MOBILUS.