Mini-rotary viscometer

The mini-rotary viscometer is a device used to measure the pumpability of an engine oil at low temperatures.[1] Engine oils must meet viscometric standards including those determined by the MRV in order to be classifiable within SAE J300 viscosity grades.

References

  1. ↑ H. Shaub; M. F. Smith; C. K. Murphy. STP621-S4 Predicting Low Temperature Engine Oil Pumpability with the Mini-Rotary Viscometer. ASTM International. doi:10.1520/STP27339S.
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