My LSH did not have any traxxas 500K diff fluid.
They only had 1M Factory team diff fluid
I have read a few posts saying 1,000,000cst is = to 100K wt
The LHS said NOPE. but its thicker than traxxas 500K
and the same with the bottle I have
If any one is interested it is definitately thicker than traxxas 500K
MUCH Thicker and less than 1/2
I had to boil the bottle in water to get it in my Telluride diffs

Just my findings