SG Grade is a multigrade gasoline engine oil based on mineral base oil and additives, supplied as SG/CD 20W50. Available grades: SG/CD 20W50. API lists SG as obsolete: it is not suitable for most gasoline automotive engines built after 1993.
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Grades & published data
Typical values from the product data sheet, each with its test method.
| Property | SG/CD 20W50 | Method |
|---|---|---|
| Kinematic viscosity at 100 °CcSt | 19 | ASTM D-445 |
| Viscosity index | 125 | ASTM D-2270 |
| Total base number (TBN)mg KOH/g | 9 | ASTM D-2896 |
| Pour point°C | -24 | ASTM D-97 |
| Flash point (open cup)°C | 226 | ASTM D-92 |
| Density at 15 °Ckg/m³ | 890 | ASTM D-4052 |
Overview
SG Grade is a multigrade gasoline engine oil based on mineral base oil and additives, supplied as SG/CD 20W50. Available grades: SG/CD 20W50. API lists SG as obsolete: it is not suitable for most gasoline automotive engines built after 1993.
Each grade is listed separately in the specification table with its viscosity at 100 °C, viscosity index, flash point, pour point, density and base number, so grades can be compared directly before ordering.
Application
Vehicles whose handbook specifies API SG; API lists SG as obsolete for most engines built after 1993.
Feature
SG/CD 20W50: KV100 19 cSt, VI 125, TBN 9, pour point -24 °C.
Feature
Supplied in a single grade, which keeps stock simple for fleets that run one viscosity.
Follow the SAE grade in your vehicle handbook. Under SAE J300 a lower W number is rated for colder starts (0W at −35 °C, 5W at −30 °C, 10W at −25 °C, 20W at −15 °C); the second number is the viscosity class at operating temperature.
Next step
The range above is what we publish. Formulation to a customer brief is a route of its own, and a sample is the first stage of it.
