They were going to throw out 4 pails of new, unopened ISO 100 and 150 gear oil/hydraulic fluid at work. They are also marked R&O AGMA #3 and #4, respectively. So I do know that these are combination hydraulic oils/gear lubes, and r&o simply is indicative of rust and oxidation additives. That's all I know. My question is, would these lubes be suitable or acceptable for use in a 1947 Ford 2N Tractor, which has spur cut gears in the transmission, and a shared sump (5 gallon capacity) for the trans, rear differential and hydraulic lift? Apparently the ISO 100 is equivalent to the viscosity of 80-90 weight gear oil (or 30 weight engine oil) and the ISO 150 is the equivalent of 90 weight gear oil (or 40 weight engine oil). Or should I just try to sell them on Craigslist? The tractor is literally the only application I can think to use this stuff for in my garage. Thanks for any insight.
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