VictorW
Veteran Member
The shop manual for my CK30hst suggests that squelling hydralics can be caused by the wrong weight oil. Especially if noticed right after an oil change. As DrewL stated, the oil is not exotic but there are different weight oils. When you just look for a universal oil, the weight isn't always marked on the container. Also, different companies add there own blend of additives for corrosion, anti-foaming, etc. I'd try to use what the tractor calls for or if you have an oil distributor in the area, they usually can cross reference their brand of oils to another brand to match specifications.