Hello,

We are new to the forums. After a brief forum search we were unable to find the answer to our question so:

Is it critical to use hydraulic fluid specified by the equipment manufacturer?

From another angle:

Can we use one type of hydraulic fluid for serveral different (and very old) machines?

We have several old boom lifts, a hyster fork lift, an old sweeper, two Genei scissor lifts, and a couple of other dinosaurs.