Lube my Tranny
#61
Boost Pope
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At 40°, the Ford stuff scores a 76 cSt viscosity, whereas most competing oils are in the 90-100 cSt range. This is confirmed by a higher stated viscosity index of 211 (ASTM D-2270), as compared to typically 160 or so for most other oils I'm looking at. So it should be about 30% thinner when cold.
For comparison, "most" other oils I'm looking at includes Valvoline SynPower 75W-90, Amsoil GL-4 75W-90, Mobil1 synthetic 75W-90 and Redline MT90. (The Redline comes closest to the Ford's low-temp viscosity, with a 90 cSt at 40°, but it's still a far cry.)
It also smells like strawberries*.
* = does not smell like strawberries.
#64
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That having been said, 10W-30 is in fact a powerful laxative.
#67
The Ford spec sheet calls it a fully synthetic GL-4 75W-90, with a viscosity at 100°C of 15.4 cSt.
robert
#68
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It's amazing stuff. I can't see myself using any other transmission oil in the foreseeable future.
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