Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus

Importancia y uso:

5.1 This bench test method is intended to produce comparable oil aging characteristics to those obtained with ASTM TMC Sequence IIIGA matrix reference oils 434, 435, and 438 after aging in the Sequence IIIG engine test.

5.2 To the extent that the method generates aged oils comparable to those from the Sequence IIIG engine test, the measured increases in kinematic and MRV viscosity indicate the tendency of an oil to thicken because of volatilization and oxidation, as in the Sequence IIIG and IIIGA (see Appendix X1 in Test Method D7320) engine tests, respectively.

5.3 This bench test procedure has potential use in specifications and classifications of engine lubricating oils, such as Specification D4485.

5.4 The results of this test method are valid when seeking qualification of oils against published specifications only when run on a test stand that has successfully met the calibration requirements specified under the TMC’s ROBO test monitoring program.

Subcomité:

D02.B0.07

Referida por:

D4485-22E01

Volúmen:

05.04

Número ICS:

75.100 (Lubricants, industrial oils and related products)

Palabras clave:

evaporative loss; low-temperature pumpability; MRV viscosity; oil aging; oil oxidation; oil viscosity; ROBO test; sequence IIIG test; sequence IIIGA test; volatiles;