Bobcat 863 Hydraulic FLUID recommendations please

I recently purchased a 1998 bobcat 863 high flow skidsteer and am servicing the machine and have been told many different opinions on the proper hydraulic fluid. Bobcat recommends there own hydrostatic /hyraulic fluid. I have freinds with similar machines who tell me that they use aw-32 on there machines witch is alot cheaper than the bobcat recommended hydrostatic fluid. Obvoisely the manufacterer will always say to use there product which is much more expensive. I have no problem purchasing ther hydrostatic /hydraulic fluid. Just looking for any recommendations from anyone with experience with this please and thank you your help is very much appreciated