kinematic viscosity
also called viscosity
The measured thickness of the fluid, in mm2/s (cSt), at a stated temperature — Castrol GTX 20W-50 is 171 at 40 C and 18.3 at 100 C; Toyota Type WS is 23.12 and 5.338; TotalEnergies HBF 4 is 880 max at -40 C and 1.5 min at 100 C. CARDINALITY MANY, because a sheet always publishes at least two points and the pair is the whole content: one figure alone says nothing about how the fluid behaves between cold start and running. It is the MEASURED counterpart of `viscosity_grade`, and it is not redundant with it — it is the only way to state the viscosity of a fluid that HAS no grade, which is precisely the case for every automatic-transmission fluid (Toyota Type WS, Type T-IV, DEXRON III, Nissan CVT NS-3 publish mm2/s and no grade at all) and for a grease's base oil, where the manufacturers' own sheets show an ISO VG is only an approximate equivalent while the mm2/s figure is the measurement. Concern measurement.
Kinematic viscosity is a measured figure.
It belongs to measurement — its measurable, physical facts.
the bundle what travels with each kinematic viscosity
A kinematic viscosity is not a lone value — each statement is a self-correlating bundle, carrying its own:
asked by the kinds that answer it
3 kinds answer it, each for any number of values. The same question can be reused by unrelated kinds — one meaning, many homes.
asked by kinds that answer it
The same question can be reused by unrelated kinds — one meaning, many homes.
| kind | how many |
|---|---|
| service fluid | many |