# Oil... how does it work? \[split\]

**URL:** <https://forums.speedlife.net/t/oil-how-does-it-work-split/262189>\
**Category:** Shift518 Off Topic\
**Created:** [January 6, 2012, 11:40pm UTC](https://forums.speedlife.net/t/oil-how-does-it-work-split/262189 "2012-01-06T23:40:40Z")\
**Posts on this page:** 1\
**Showing post:** 142

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**Author:** ![Vovchandr](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/vovchandr/32/6275_2.png) [@Vovchandr](https://forums.speedlife.net/u/Vovchandr)\
**Post date:** [January 10, 2012, 9:14am UTC](https://forums.speedlife.net/t/oil-how-does-it-work-split/262189/142 "2012-01-10T09:14:59Z")

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> [@fridays- Tubby's cruise night](https://forums.speedlife.net/t/fridays-tubbys-cruise-night/47343/31):
>
> oh cSt
> 
> Check this out:  
> The viscosity of a fluid is highly temperature dependent and for either dynamic or kinematic viscosity to be meaningful, the **reference temperature** must be quoted. In ISO 8217 the reference temperature for a residual fluid is _100oC_. For a distillate fluid the reference temperature is _40oC_.
> 
> - For a liquid - the kinematic viscosity will **decrease** with higher temperature

All those cSt figures were taken at the same temperature in the chart above if I understand it correctly so temperature shouldnt be a factor.

It’s taking different grades, bring them up to the same temperature and rating them on their fluidity.

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