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Viscosity of 15w-40 at room temperature

Viscosity of 15w-40 at room temperature

Viscosity of 15w-40 at room temperature

(OP)
Would someone be able to help me out and tell me what sort of range of viscosities 15w-40 could fall into at approximately 20 degrees centigrade.  I know that there can be a lot of variation but if someone was able to either give me a range of values it would be between or a link to this information it would be much appreciated.

By my own rough tests I have found it to be 382 cP - would this be a figure that could be possible for 15w-40 oil at room temperature.  The reason I ask is that I have been conducting an investigation into stokes law but I need to know approximately what the true viscosity of the 15w-40 oil I have been using is so as to make a fair comparison.

RE: Viscosity of 15w-40 at room temperature

donsrno1:

Why do your own "rough" tests?  Certainly, the manufacturers (Exxon, Shell, etc.) know the exact, lab data on 15W-40 motor oil.  Why not phone them and ask them for the viscosity at 25 oC?

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