ORIGINAL: merugo

Motorboy,
as usual you have lost a good occasion for being silent!
CUP VISCOMETERS MEASUREMENTS ARE INHERENTLY INDEPENDENT FROM THE SPECIFIC WEIGHT OF THE FLUID UNDER MEASUREMENT. IN FACT THEY DIRECTLY MEASURE K.I.N.E.M.A.T.I.C VISCOSITY through the flowing time.
This quantity is so universally used that often kinematic viscosity is directly expressed in "seconds" and this "viscosity" is often used for oils. BTW, kinematic viscosity is the only "viscosity" that has been usefully modeled in linear way versus temperature with appropriate charts.
As it is clear, you are absolutely unaware of the theory of measurements, keep a good book and study how to calculate measured quantities and related errors. It involves some matemathics and some time, but allows for more reasonable comments than your childish ones. As for my calibrating solutions, I do not remember to have ever seen you in my home laboratory, so I congratulate with you with your exceptional sight from Norway to Italy.
Sorry, but having to spend better my time than following your primitive and insinuating observations I will no more reply to you until you do not assume a more respectful attitude.
Ugo