SEDL / STP / STP1143-EB / STP19597S

The Development of European Test Methods for the Measurement of Engine Oil Viscosities at Low Temperatures

Vickars, MA
Scientific AssociateChairmanSenior ChemistManagerPrincipal ScientistSenior Chemist, Esso Research CentreRohm and Haas Co, Petroleum Chemicals ResearchChemical Laboratory, Lubrizol International LabsShell Research LtdDeutsche Shell AG, PAE-Labor, AbingdonSpring HouseHazelwoodChesterHamburg, OxfordshirePADerby

Huby, FJ
Scientific AssociateChairmanSenior ChemistManagerPrincipal ScientistSenior Chemist, Esso Research CentreRohm and Haas Co, Petroleum Chemicals ResearchChemical Laboratory, Lubrizol International LabsShell Research LtdDeutsche Shell AG, PAE-Labor, AbingdonSpring HouseHazelwoodChesterHamburg, OxfordshirePADerby

Jordan, CE
Scientific AssociateChairmanSenior ChemistManagerPrincipal ScientistSenior Chemist, Esso Research CentreRohm and Haas Co, Petroleum Chemicals ResearchChemical Laboratory, Lubrizol International LabsShell Research LtdDeutsche Shell AG, PAE-Labor, AbingdonSpring HouseHazelwoodChesterHamburg, OxfordshirePADerby

Bates, TW
Scientific AssociateChairmanSenior ChemistManagerPrincipal ScientistSenior Chemist, Esso Research CentreRohm and Haas Co, Petroleum Chemicals ResearchChemical Laboratory, Lubrizol International LabsShell Research LtdDeutsche Shell AG, PAE-Labor, AbingdonSpring HouseHazelwoodChesterHamburg, OxfordshirePADerby

Müller, HD
Scientific AssociateChairmanSenior ChemistManagerPrincipal ScientistSenior Chemist, Esso Research CentreRohm and Haas Co, Petroleum Chemicals ResearchChemical Laboratory, Lubrizol International LabsShell Research LtdDeutsche Shell AG, PAE-Labor, AbingdonSpring HouseHazelwoodChesterHamburg, OxfordshirePADerby

Pages: 15    Published: Jan 1992

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Abstract

In response to the Society of Automotive Engineers' (SAE) desire to introduce cold-cranking viscosity limits measured at temperatures specified for each W-grade of engine oil, the Co-ordinating European Council (CEC) joined ASTM in 1982 in determining a precision statement for the so-called “Multi-Temperature CCS Method”. In 1990, CEC again collaborated with ASTM in a similar round-robin test which this time yielded a precision sufficiently encouraging for ASTM to ballot for Standard Test Method status. Two new techniques (differential scanning calorimetry and gas chromatography simulated distillation) differentiated between a limited population of good and poor industry pumpability reference oils. These techniques indicated that some model SAE 10W-30 oils blended from “critical” base oils could be potential pumpability problem oils despite acceptable borderline pumping viscosities in the Brookfield viscometric using the TP-1 cooldown cycle. The DSC and GC techniques are recommended as screening tests when developing new formulations. The development of a low-temperature oil pumpability test method employing the Brookfield viscometer in conjunction with the cooling cycle adopted in ASTM D4684-86 is described. Reference is made to a new, European-designed, high-precision viscometer for the measurement of low-temperature cranking viscosities.