amkorp wrote: ↑Jul 17th, 2017 11:01 am
I don't think you quite understand what he's trying to say. If you take the same weight oil in conventional and synthetic formats, you'll find that the synthetic will be less viscous than the conventional. This is how synthetics help with cold starts and colder weather. The viscosity on the synthetic will be much lower than the conventional in colder temps therefore allowing it to flow easier than the conventional.
You're interchanging functional weight and viscosity in your posts. You can't do that, you've got to start with the same weight oil in which viscosity is affected by temperatures.
Alright, Google chemists; numbers are marginal at best!
Mobil 1 5w30 syn:
Viscosity @ 100ºC, cSt (ASTM D445) 11.0
Viscosity, @ 40ºC, cSt (ASTM D445) 61.7
Amsoil 5w30 syn:
Kinematic Viscosity @ 100ºC, cSt (ASTM D445) 10.4
Kinematic Viscosity @ 40ºC, cSt (ASTM D445) 59.9
Pennzoil 5w30 conv:
Kinematic Viscosity @ 100ºC, cSt (ASTM D445) 10.5
Kinematic Viscosity @ 40ºC, cSt (ASTM D445) 63.4