"Claimed saving of 10 watts from specially treated Dura-Ace chains....
Muc-Off claims over 400 miles in the dry and 250 miles in wet and/or muddy conditions."
https://www.cyclingweekly.com/news/p...-chains-429229
There we have it, after 400 miles in the dry: Done.
Time for a new fully treated DA chain or
Lost Watts!