Quote:
Originally Posted by RalphG
Anybody using #30 motor oil in their standard transmissions? Thats what I have in the four speed T17 in my IH Loadstar. The manual calls for straight mineral oil #50 so this is a little lighter than they recommend. Seems to work great.
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Here is the comparison between the different viscosity ratings. But keep in mind that the additives are very different between them.