METHOD OF DETERMINING QUALITY OF MOTOR OILS Russian patent published in 1998 - IPC

Abstract RU 2117287 C1

FIELD: motor oils. SUBSTANCE: ratio of difference of working and fresh oil densities to fresh oil density is determined, and quality of oil is judged of from specified relationship between this ratio and alkali number. EFFECT: increased accuracy. 1 dwg

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RU 2 117 287 C1

Authors

Ishmakov R.M.

Vasil'Ev V.I.

Khafizov A.R.

Abyzgil'Dina M.Ju.

Dates

1998-08-10—Published

1996-07-08—Filed