Overview
CD Grade is a monograde diesel engine oil based on mineral base oil, formulated with a high alkaline reserve (TBN). Available grades: CD 40, CD 50. API lists CD as obsolete: it is not suitable for most diesel automotive engines built after 1994.
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
Road-construction machinery
Diesel machinery in road construction, as named in the product's source documentation.
Application
Naturally aspirated diesel vehicles
Non-supercharged diesel vehicles in normal working conditions whose manuals specify API CD.
Feature
Published values by grade
CD 40: KV100 15.5 cSt, VI 100, TBN 10, pour point -15 °C; CD 50: KV100 19 cSt, VI 100, TBN 10, pour point -12 °C.
Feature
Alkaline reserve for corrosion control
The catalogue positions this oil around its alkalinity; each grade publishes a TBN of 10 mg KOH/g.
Feature
Choice of viscosity grades
2 grades in one product line, so a fleet can standardise on one API level across different climates or engine requirements.