Originally Posted By: CaspianM
All chains are spec'ed to use gear oil 75W-90. I used to use it but once dry it is hard to clean. Hence I opted for synthetic motor oil such as 15W-50 M1 MC oil and use it by brush followed by ragging it a bit. WD-40.. I have no idea what it is so I don't use it.
I'm going to try using synthetic or even Dino motor oil to see how it works. I have all kinds of leftover oils so I might as well.
I have some WD-40 too but I don't plan to put any on my chain. WD-40 is a very controversial thing to apply to a bike chain. Some swear by it, and some think it should not be used on bike chains because of possible damage to O rings. I use it on some things, but not on a bike chain. It's very smelly, and I'm not fond of smelly petrochemicals.
I'd probably like WD-40 better than an aerosol chain lube but I haven't gotten to use it on a bike chain yet and I don't know if I ever will. I don't doubt that it works good but I only need one chain lube so I can't use them all.
Some people take the chain off and put it in a pan of hot grease, then let it drip dry, then put it back on. That sounds like more work than I'd want to get into. Great way to lube the chain though.
Some use kerosene to clean a chain, which is also very smelly.
I do think gear or motor oil works very well. My chain is not noisy with these oils, and I apply them regularly.