There are a lot of Wurth HHS products but I believe there is just one that is HHS2000. It is also called HHS 2K in the USA as it had to be reclassified for some EPA reasons but I read it is the same product....
I will follow up on the Wurth HHS2000 and see how that pans out with my chain life. I see two versions, one oil and one grease. Which do You use ? Thanks again for your very extensive and useful input.
There was one other rider that posted in a thread he that was at about 54,000 miles on his chain and seemed to do roughly what I do. iirc he is using a teflon product though so while I don't have any experience with using that it may be that what really matters is the frequency of using the lube. I especially like the Wurth because of its salt resistance as I am often riding on roads that hare been salted or brined and often my chain (and whole bike) is covered with the stuff.