To me sounds like it was just knocking from low oil..
Spun bearing is nastyyy nasttyyyy nasttyyy...
Whens the last time you changed / checked it?
If its been a LONG while then thats the answer..
Keep an eye on the oil level after you change the oil / filter, make sure you check it every week, or 300 miles.
Use any filter but fram.. lol
Fram = garbage . IMHO
Change your oil @ 2,500 for the next change, and see how much comes out / color, etc.
Same amount or a little less = OK
1-2 quart less = Big Problem
If your driving like Speedracer, id quit.. before something big happens... Like siezed engine, broken tranny, etc.
Just my 2 cents.