SAE viscosity grades

SAE Viscosity grade Viscosity, mPa-s(=cP) at °C Borderline pumping temperature, °C Minimum Maximum... 

SAE (Society of Automotive Engineers)—organization responsible for the establishment of many U.S. automotive and aviation standards, including the viscosity classifications of engine oils and gear oils. See SAE viscosity grades. 

SAE viscosity grades-engine oil classification system developed by the Society of Automotive Engineers (SAE), based on the measured viscosity of the oil at either -18°C (-0.4°F), using test method... 

SAE viscosity grade Maximum absolute viscosity at-18°C, mPa-s Minimum kinematic viscosity at +100 °C, mm2/s Maximum kinematic viscosity at +100 C, mm2/s... 

Viscosity index (VI) improver (a) Demonstrate that the viscosity index as plotted in Figure 2.6 illustrates the viscosity index improver requirement, (b) Show that multiplication of polymeric viscosity index improver makes it possible to utilize it in several SAE viscosity grades, e.g., SAE 10, SAE 20, SAE 30, SAE 40, SAE 50. 

SAE viscosity grade Low temperature (°C) cranking viscosity (cP, max)b Low temperature (°C) pumping viscosity (cP max, with no yield stress) Kinematic viscosity (cSt) at 100°C mind Kinematic viscosity (cSt) at 100°C mind High shear viscosity (cP), at 150°C and 10 V, mine... 

SAE viscosity grade Low-temperature,°C, cranking viscosity, mPa-s, maximum Low-temperature,°C, pumping viscosity, mPa-s, maximum, with no yield stress Low-shear rate kinematic viscosity mm /s at 100°C maximum/minimum High-shear rate viscosity, mPa-s at 150°C, minimum... 

API is not an approval body but certifies lubricant quality, developing its Service Symbol (Fig. 17.1) in 1983, issuing licenses to oil companies for promotion of their lubricants. The symbol s centre circle shows the lubricant SAE viscosity grade, the outer ring upper half contains the API performance classification (only current performance qualities shown, obsolete performance levels may not be used). The outer ring lower half indicates an energy-conserving or fuel economy standard. API s... 

SAE viscosity grade Maximum absoiute viscosity at-18 °C (mPas) Minimum kinematic viscosity at + 100 C(mm2 s"b Maximum kinematic viscosity at+100 C (mm s T... 

After 1981, the low-temperature portion of the SAE viscosity classification system is to be superseded by a revised system, following an 18-month (1980-81) phase-in. The new system introduces the following key changes 1) two new grades are added—a 0W grade for... 

The limitations of pour point depressants are complex, controlled by the nature of the lubricant, the concentration and also the nature of the pour point depressant. The effect of pour point depressant varies widely with respect to the oil, but they are most effective with thinner oils such as SAE 10, SAE 20 and SAE 30 grades. Only small effects are seen with SAE 50 grade oils. Different types of pour point depressant also have different efficiencies, with the maximum effect occurring at an optimum concentration level. Above this optimum level, there is usually an appreciable effect on viscosity at higher temperatures. Typical levels of application in commercial oils are 0.1-1.0%. 

Viscosity grades AU those that apply, typically SAE Manufacturer sets targets... 

CMls shall meet all of the requirements of SAE J300. Viscosity grades are limited to SAE OW, 5 W and lOW multigrade oils. 

The Society for Automotive Engineers (SAE) has developed a viscosity classification system for finished (i.e., not just the base stock) engine lubricants that defines viscosity ranges as well as low temperature properties. The 2004 SAE J300 grades are shown in Table 1.7.9... 

Two mineral oils having the viscosity grades, SAE 10 and 40 were tested under four conditions involving the presence of water or the extreme pressure additive. The mass spectrometry results for each fluid are shown in figures 3 and 4. 

The SAE viscosity classification of oils shown in Table 3-24 is most widely used. The lOW and 20W grades are for winter service. Perhaps... 

A chart by J. Groff relates the SAE grades, the kinematic viscosity, and the viscosity indices. This correlation is given in Figure 6.1 in the 1994 edition. 

Comparisons are nominal since SAE grades are not specified at 40°C viscosity VI of lubes could change some of the comparisons. 

Later, the SAE series was extended to include much thinner oils because of the growing demand for easier winter starting. The viscosities of the three new grades were specified at °F (typical of cold morning temperatures) and each was given the suffix W for winter - SAE 5W, low and 20W. Later still, grades of OW, 15W and 25W were added to satisfy the more precise requirements of modem engines (Table 52.3). 

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