Sigh...
Just spend $5-$10 and get some chain lube. Motor oil is not meant for chains.
Lubricants Not to Use!
While it's hard to say which lubricants are best for chains, some lubricants are real no-nos:
- Automotive motor oil contains detergent, to wash away combustion products, and is made to be renewed constantly under pressure from the motor's oil pump. I [John Allen] rode once with someone who had used it the day before, and her chain was already squeaking.
https://www.sheldonbrown.com/chains.html#oil