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Ford 9N, 2N & 8N Discussion Forum
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Re: Extreme Pure Flow Tractor Hydraulic Transmission Fluid

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Author  [Modern View]
TheOldHokie

08-17-2013 09:50:02
108.22.206.126



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Dave8N in Pa said: (quoted from post at 08:30:01 08/17/13) It's my understanding that 134c is for warmer climates. 134d is for colder weather. I am tying that oil now. My hyd.pump likes it. My trans. likes 90 weight better. The UTF is 60 weight I think. I could be wrong.


Forget "weight" because the numbers are SAE engine or transmission viscosity GRADE numbers and not applicable to these types of oil. The Xtreme products are manufactured by Cross oil and come in a number of different viscosities and qualities. Here are the actual viscoity data for three of their products as well as Ford M2C-134D:

Xtreme SAE 90 GL1 gear oil: viscosity = 13.5 cSt@100C, VI = 90

Xtreme PureFlo Tractor Transmssion fluid: viscosity = 7.3cSt@100C, VI= 54

Xtreme Premium Tractor Transmission fluid: viscosity = 9.3cSt@100C, VI = 140

Ford M2C134D: viscosity = 9.4 cSt@100C, VI = 134

Oils with a higher VI (viscosity index) thicken less when they get cold and thin out less when they get hot. High VI oils are excellent all weather performers. Low VI oils are only suitable for use in a narrow range of temperatures and are not all season oils. Based on that alone it should be obvious that the PureFlo oil is a relatively thin oil when hot and like molasses when cold. It is an economy fluid made from low grade base stocks and ill suited for use below 32F (or even temperatures a bit warmer). It is also a good bit lower viscosity when hot making it a lighter duty gear oil for use only during mildly warm weather. The Premium fluid is a LOT better and nearly identical to M2C-134D.

FWIW if you wanted to put a viscosity grade number on the Premium or Ford M2C-134D oils they would be on the high end of SAE 80 gear oil (SAE 85 starts at 11.0) or in the middle of SAE 30 engine oil (9.3 to 12.4). Both have a much higher VI than conventional gear oil and will work a LOT better than a mono-grade SAE 80 gear oil when the temperatures are near or below freezing.

TOH
This post was edited by TheOldHokie at 10:31:24 08/17/13 3 times.

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