Grace 940 unipivot tonearm

Hi everybody,
My first post even though I've been reading the forum for quite long time.
I bought recently a brand new(!) [never used in the box]940 Grace tonearm.My first unipivot .And I have some questions to put to all the experienced users of this tonearm.
It came with a bottle of dumping oil as thick as honey.I was not able to take it off the bottle with the plastic syringe .
Is it supposed to be that thick or it is so because of aging ?
What oil viscosity should I use?(100-200-or more)
Is the tonearm better suited with high comliance cartridges?
Right now I use a JVC Z1 with Jico SAS stylus and even though I am quite pleased with the result the combination doesn't pass the truckability tests of HiFinews record.(3 last trucks of side 1).
Am I doing something wrong or should I go for a new cartridge (or tonearm)?