RWM - interesting topic. Modern roller bike chains have a problem - no O rings in the rollers. When we ran trials bikes in the 80s we also had no O rings in the chains. We had a tin of Castrol chain wax, where you cleaned the chain in paraffin and blew it dry, shaking all the crap out when it was dry. You with a GAZ burner then heated the big flat tin of solid wax, which melted to a brown thin oil...you then coiled the cleaned chain and 'cooked' it for a few minutes until the wax got right into the rollers, and then hung the chain over the tim, catching the liquid run off. The point is this: you want good lubricant INSIDE the rollers - not on the outside where it does NO GOOD AT ALL. The best product now is MucOff motorcycle wetlube (purple can). After properly cleaning the chain with whatever you want, the chain is re-fitted dry, then this gets sprayed on the links as you rotate the chain slowly. As spray, it is very thin and volatile, it penetrates right into the chain, inside the rollers, and there thickens into a solid wax as the carrier fluid evaporates. This is good. It's what you need. I have been using this since it came out, and chains have lasted forever - even in the sandy nastiness of Thetford, which is a known transmission-killing zone. Last week I did one of the muddiest rides of the season. I had no idea what colour the bike was - could have been any of the bikes in the barn. I assumed I would again have a chain which 'crackled' with interior grit when you twisted it. Not at all. Nothing. So surprised was I that I cracked the joining link and had a really good look at the chain. Mucky on the outside, beautifully smooth and lubricated on the inside. This stuff is good. I seriously would recommend it.