Ansmann big-bore shocks leaking

[DB420]

Hi everyone,

This is my first "serious" post on this forum.
I have a bit of a problem with the shocks on the car I almost finished building.
All 4 big bore shocks which came with my Ansmann X2TE are leaking.
The one's in front only leak a bit but those in the back lose their oil on a daily basis.
I already rebuild them once but I can see no improvement. It seems they are leaking between the shock body and the lower shock cover.
The oil I received with the kit states it's density is 200#; is this oil too thin?

Hope I get this problem solved as this seems to be a cool kit.

Greets,