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Old 01-22-2015, 03:21 PM   #61
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How thick is the Motorcraft stuff? Between 10w30 and gear oil, or straight up gear oil?
The Ford spec sheet calls it a fully synthetic GL-4 75W-90, with a viscosity at 100C of 15.4 cSt. This puts it into approximately the same range as the full-synth 75W-90 gear oils from most other major manufacturers at the upper end of the operating temp range.

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.
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Old 01-22-2015, 07:05 PM   #62
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does not smell like strawberries.
Should have written "tastes", without the disclaimer. If you were evil.
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Old 01-22-2015, 07:21 PM   #63
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Should have written "tastes", without the disclaimer. If you were evil.
I keep telling people that putting Amsoil Dominator in their coffee keep them regular. I imagine it will make you violently ill, but I'm not going to find out
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Old 01-22-2015, 08:46 PM   #64
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I keep telling people that putting Amsoil Dominator in their coffee keep them regular. I imagine it will make you violently ill, but I'm not going to find out
Speaking from first-hand experience, if one is assembling a VW engine in a barn in Florida, one should not place a styrofoam cup of Dr. Pepper on the workbench immediately next to an identical styrofoam cup of motor oil.

That having been said, 10W-30 is in fact a powerful laxative.
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Old 01-22-2015, 10:34 PM   #65
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Aidan, the Ford dealer on 122nd.
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Old 01-22-2015, 11:26 PM   #66
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Aidan, the Ford dealer on 122nd.
Thanks
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Old 01-23-2015, 11:12 AM   #67
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The Ford spec sheet calls it a fully synthetic GL-4 75W-90, with a viscosity at 100C of 15.4 cSt.
Very interesting specs. Looks really great. I may have to give this a try over MT-85 next year. Love that 211 VI.

robert
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Old 01-23-2015, 07:00 PM   #68
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Very interesting specs. Looks really great. I may have to give this a try over MT-85 next year. Love that 211 VI.

robert
One presumes that the difference in low-temperature viscosity between Ford Unicorn Tears and every other GL-4 75W-90 is even more pronounced at extremely low temperatures, such as 0C, than at the lowest published temperature of 40C.

It's amazing stuff. I can't see myself using any other transmission oil in the foreseeable future.
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