I'm looking into UTTO (Tractor Hydraulic Fluids). What I am finding in some cases is not good. Under treating the additive is more common than I thought so what I am looking for is what brand do you use and then has anyone done VOA on the product, that way it is possible to tell in most cases what exactly is being done. Believe it or not some of the really cheap products have little or no additive content at all!