My bike shop guy recommended it to me many years ago and I’ve been using it ever since, no problem with my chain.
Here’s a problem I have had though, bottom bracket bearings! I live/ride in central Florida’s heat and humidity, and I sweat a lot all summer on a typical 50 mile, 3 hr ride, 5 days a week. How long should a bottom bracket bearing last and is there any way to get some T9 down in there to make it last longer? I seem to go through at least 1 a year (8,000-10,000 miles) sometimes 2 per year. I almost never ride in the rain or on wet roads, but I’m sure some of my sweat is getting in there. Any way to stop that?