Silicone fluid for Moerch tonearm damping?

I have never tried to add silicone fluid to the tonearm well on my Moerch DP-6 tonearm, just used it for the pickup lifter, but have been told that it might help me with the new cartridge I will be getting, a Denon DL-103. The Moerch tonearm (blue dot) at 14 grams is a bit less than the effective mass that the Denon cartridge prefers and I was told that damping the tonearm might help with tracking and just make the whole set up sound better. I am willing to give this a try, but I seem to have misplaced the container of silicone 'fluid' that came with the tonearm and can't find any specs about what actual fluid was recommended by Moerch.

Does anyone know what weight of silicone fluid (oil?) should be used for the Moerch tonearms? Turntable Basics sells damping fluid, but I need to know which weight would be best.

(FYI, I did email Moerch about this, but haven't received an answer (someone told me I am not likely to ever get an answer from them. :-( ) and I also emailed Sorasound, the USA distributor, but received a "canned" response from Mehran saying he was in Belgium until near the end of the month and that I should email him again at that time.)