[AT] Transmission&Hydraulic Fluids

[Ray Trimble]

I'd like to change the fluid on my MF 65 the manual says to hange it yearly and its been 15 years at least. The manual callas for straight mineral oil 90 weight. Looking in farm stories and online I can't find anything with that nomenclature. Doing a little research it appears to be GL-1 fluid but again i don't see GL-1 in stores. A little more research I find that this fluid is classified as GL-1 to GL-5 but GL-5 is not downward conpatable and some will harm yellow metal, I don't know if I have yellow metal. So what I want is a fluid that meets my need and not costing $200 for the 8 gallons
ThanksRay. 
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