For a while it seemed to work. No more squeaks and groans...or so I thought. But gradually the pedaling felt rough under my feet and worsened until the chain was literally grinding over the cogs.
At first I thought the year-old chain needed replacement, but after measuring links I determined that wasn't the cause. I borrowed a bit of my husband's bike oil and applied it in place of the Mystery Oil. After wiping the chain and pedaling a few laps of the neighborhood, the problem cleared up - just like that.
I learned my lesson: always use specific bicycle lubricant. But this irks me, in a way, because a bike is a machine and there must be a multipurpose oil that could replace those expensive small bottles, only found at a bike store.
In a pinch I've used motor oil on a chain, but it was a one time event - I have no idea how this stuff works over the long haul.
What kind of lubricant do you use?