I have posted this before but please notice there are two Honda Power Steering fluid specifications with different 100C performance specs:
Quote
Typical Properties
[HONDA PERFORMANCE PS FLUID]
Appearance Lt. Pale
Flash, COC, Deg F. 355
Pour Point, Deg F. -40
Viscosity, cSt
At 40 C. 53.75
At 100 C. 11.34
Viscosity Index MIN 205
Viscosity, Brookfield cP @ -40C < 64000
Oxidation Stability, D-2272 > 200 minutes
Copper Corrosion 3A Max.
Zn Content, ppm. 1500
P Content, ppm. 1300
Mg Content, ppm 580
Ca Content, ppm 220
TBN, ASTM D-4739 5.0
Honda PN 08208-99961
The newer Honda/Acura PSF PN 08206-9002 PF has the following basic properties:
API Gravity / lbs./gal. 32.6 / 7.18
Flash Point, PMCC ºC 92
Viscosity
cSt @ 40ºC 31.4
cSt @ 100ºC 6.5
Viscosity Index 167
Pour Point, max, ºF / ºC -50 / -45