Saab roof hydraulic oil is aviation spec which is why it's so expensive, as peva says, some people use hydraulic jack oil with no issues but don't use either of the oils you mentioned, they are not suitable.What is the proper fluid for the convertible top pump and system? eEuroparts wants $35 for a bottle of "Hydraulic Fluid? Will AT fluid or Power Steering Fluid or CHF11s work?
I agree philjohn, it's very unlikely to be a fluid issue, nor adjustment neither. Opening the valve in the boot and try pushing the hood down would confirm this. There's no adjustment that would cause this. My money's on a badly fitted hood. I had it once to a lesser extent on one side only. Too many layers of material. I assume you've checked the obvious, and there's not too much stuff in the boot/trunk.If the roof is not retracting it will be either an obstruction, mal-adjustment of the mechanism or, as has been mentioned, the roof is new and too tight.
It is unlikely to be a fluid issue, if the fluid runs low or has air in the system it just runs slower until it stops altogether..