Hate to spoil a budding oil war with real facts, but I started experiencing the mild start up slip, that "on cold start up" slip, which is the symptom most people get when clutch slipping begins.
Changed to Rot Dino and the cold start slippage issue stopped, which is in line with what others have posted about contamination issues and using Rot Dino to clean it up.
Rot Dino has no moly oil in it, Rot Syn has 60+ PPM of moly oil in it now (and the amount seems to go up each new Sl SN type SAE formulation change).
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So, if you have no slippage truck on with T6 as it is the better formulation. If you get some cold start up slippage, switch over to Rot Dino and see if it stops. Do this before doing a clutch replacement exercise as it is in essence a free fix.
Abused clutches will likely show the issue before normal use clutches will show it.
MM is jest fishin' fer a fat old cat fish, floating him a chunk of blueberry bagel to see if he'll bite ......