Amsoil in their magazine (dealers and preferred buyers) announced a line of hydraulic oil in various ISO grades. The ISO 46 which is the grade I would expect to use is $100 dealer cost and $133 retail. I am a preferred buyer so I get the dealer price. Plus tax and shipping. I use other Amsoil products and while pricey you will not find better. I might guess better than Bobcat brand. In my car & truck I use Amsoil ATF and its probably the best ATF out there bar none. I have not ordered any, looking for comments. I need to fix a hydraulic leak first. Compare to tractor & hydraulic oil at Sams Club for $67 I think. Prices per 5 gal. bucket.