At the risk of starting yet another chain lube thread war, I'd like to report on my first week of using this stuff:
https://silca.cc/products/silca-super-secret-chain-lube
Disclaimer: I've got nothing to do with this company and paid for their product (dearly) out of my own pocket.
I started with a new Shimano chain and spent an amazing amount of time getting ALL the preservative grease out of the chain, since Silca says their lube needs a VERY clean chain.
So, two shake-in-jar washes with a water-based degreaser, followed by hot water and dish soap left the side plates still feeling greasy to my fingers. Then an agitated gasoline-in-jar treatment and blow dry with compressed air. A final rinse in 91% isopropyl alcohol left the solvent slightly dirty. Really?? Another alcohol wash came clean and NOTHING appeared on a clean white rag. I was taken aback by all my years of thinking I had actually cleaned my chains merely because they
looked clean afterward. Not so much, I found out.
I also cleaned up the cassette, the derailleur/jockey wheels, and the front chain ring.
I soaked and agitated the super-clean chain in a jar of the Silca lubricant, let it drip back into the jar, and hung it up to dry for 24 hours per their instructions. I ended up with a chain that is clean and completely dry to the touch, runs silently, shifts superbly, and STAYS clean after 50 miles of street riding. I just wipe off the chain with an old bath towel after each ride. I'm done with oil. I plan on doing the cleaning and soaking when I can hear the chain. I don't know how far that is yet.
Basically you have a waxed chain without messing around with a stove. Their "super secret" added ingredient is nano-scale tungsten disulfide which, they claim, has less than 1/3 the dynamic coefficient of friction of PTFE and 1/4 that of Molybdenum Disulfide (MoS2). They also say it can make a chain last several times longer than using other lubricants that attract dirt and end up with a grinding paste, no matter how often you clean and lubricate.
I'm thinking this may be the best approach for the problem of the shorter life span of drive chains on mid-drive e-bikes. It might even be cost effective, even with the steep cost of the lubricant. I went with the tub of the lube for soaking, plus the 4 oz. bottle for touchups.
Lastly, here's a review of the lube:
https://road.cc/content/review/silca-super-secret-chain-lube-277641