I have a wood chipper that calls for a quality 10w-30 motor oil as hydraulic fluid. I have Rotella T5 in it now but will hydraulic oil work as good or better and last longer? I know hydraulic oils can be had for a lot less money and so can different 10-30's. My reason to try something different is the high heat this system generates and why I chose the T5. This system has only a small Vickers pump and a White motor with no clutches or gears so I only looked at hydraulic fluid skipping over tractor fluid because I don't need the formula for gears and clutches. I have been looking at some hydraulic oils : MAG 1 Hydraulic Fluid R&O AW ISO 68 Sinopec L-HV Low-Temperature Antiwear Hydraulic Oil ISO 46 or 68 Super Tech Heavy Duty Rust and Oxidation Anti Wear Hydraulic Oil It's not broke but I'm afraid it will break because of 170 degrees + heat when it works more than a few hours straight. Any thoughts or suggestions will be appreciated.