And many modern machines call for it. New Holland skid steers are one example. They have spec'ed 10w-30 since the LX series came out in the 1990's.Engine oil is used as a hydraulic oil in many of the older pieces of large construction equipment and is the spec in PowerTracs.
Nope. Still using the same engine oil in the hydraulic system that it came with 20 years ago, minus a fresh quart of Mobil1 at every 50 hour filter change. Many folks have discussed changing from engine oil to hydraulic oil over the years, but I cannot recall any that actually made the switch.Wondering if anyone uses aw32 or hydraulic oil instead of engine oil in there hydraulic system.