08 Prius ATF Analysis

[friendly_jacek]

Originally Posted By: friendly_jacek

Interesting. We know WS viscosity at 100C (from VOA/UOA). But we don't know the 40C and -40C numbers. D6 must be much better in that regard.

In the meantime I found out that WS is 25 cSt at 40C. Lower than D6 (30 cSt @40C). So, WS should be more fuel efficient.

 

[friendly_jacek]

Any results of D6 UOA by any chance? The reason I'm asking is because the only 2 UOA of non-OEM ATF in Prius I saw had elevated copper. Links: http://priuschat.com/forums/gen-ii-prius...fluid-uoas.html http://hiwaay.net/~bzwilson/prius/pri_toil.html