Quote:
Originally Posted by NZ XR6
Quote from the ATE website: "Most vehicle manufacturers already use the low-viscosity DOT 4, Class 6 (ISO 4925) brake fluids in production cars (OEM and OES)"
The important spec is the ISO Class 6, not whatever DOT it is. However, DOT 5.1 has similar low temp viscosity, so would be a better choice than DOT 4. What is annoying is that I nearly picked up the Repco DOT 5.1 instead of the Penrite Super DOT 4, but Ford say Super DOT 4 so I went with it.
I'll look for some Class 6 fluid and will change it again when it starts to get cold - we can have quite low morning temps even in Auckland.
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According to this:
http://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/A3A904448D49282380257C2B001CEE1A/$File/Castrol%20Brake%20Fluid%20DOT%204%5F466630%5F2013% 5F10.pdf
Castrol DOT4 has lower viscosity than Penrite DOT5.1.
The following values are from the manufacturer's data sheets:
Kinematic Viscosity at -40 deg C. (mm/s, 1mm/s=1cSt)
Penrite DOT4 ESP 700
Penrite DOT5.1 820
Penrite Super DOT4 1147
Castrol React DOT4 Low Temp 650
Castrol DOT4 Brake Fluid 700
Castro React Performance DOT4 1250
Nulon Super DOT4 1231
On the
ABS, ESP and viscosity theory in the ate article,
Castrol DOT4 should not result in a slower response time.
Corrosion control, boiling point etc aside.
So I'm not too worried about having mistakenly used Castrol DOT4. The only problem at the moment is the dots floating before my eyes.