Does the density of a particular type of oil formulation give an indication of the amount of VII? For example, M1 10w30 has a density of .872 g/mL and M1 15w50 has a density of .864 g/mL so does the 15w50 have more VII? Or is the relationship lost in the other variables such as base oil densities?
Density and VII
- Thread starter 427Z06
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Guess I'll have to reasearch this myself. Looks like our resident Tribologists are fully engaged with the real world.
A bit of data that may help. Esters and other oxygenated compounds tend to have higher spg's than alkanes. So dino or PAO's should be lighter than the ester base stocks.
MolaKule
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No, the density is not determined by the VII or its percentage alone.
The density (not the API specific gravity) is determined primarily by the molecular weight (and viscosity) of the base oils used.
However, the total mixture determines the final density since some additives are thin and lower density, some are thick and have a higher density, so they average out.
The densities and viscosities of all the fluids in a formulation have to be considered.
See this thread for mixing info:
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=21;t=000040
The density (not the API specific gravity) is determined primarily by the molecular weight (and viscosity) of the base oils used.
However, the total mixture determines the final density since some additives are thin and lower density, some are thick and have a higher density, so they average out.
The densities and viscosities of all the fluids in a formulation have to be considered.
See this thread for mixing info:
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=21;t=000040
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