I just swapped out Cecilia's oil and the old stuff was dark as night, which I expected. But after running her for 100 yards the new oil is just as black as the old oil was. I assume that's just sludge and "yuck" in the motor coming free?
But now I have a sound kinda like a hammer on a board in the engine when she's running. It sounds like a quick bang, not crazy loud but a little faster than a heartbeat while she's running. Is it possible I broke something with an oil change?
It sounds like it's coming from the bottom of the motor, but that could just be because she doesn't have a muffler so most of her noise is from down there.
