Knocking, switch back to dino oil?

[quiksilver9531]

When i got my transam it didnt make any noises, but 2000 miles later a lit bit after i switched to synthetic I can hear knocking, I bought the car with 69k and I beleive it was ran on dino oil, I switched to mobil 1 at like 70k and shortly after my motor got louder, I can hear knocking, not loud but you can hear it, Im pretty sure its piston slap, but it doenst go away when my motor gets hot, it gets quiter but its still there, now my question is should I go back to regular oil and see if the slap goes away? and is it normal to still have slap/knock at hot operating temps? Thanks

[odinsonthor]

they say once u go synthetic to stay that way....try royal purple oil

[Sarge]

http://ls1.com/forums/showthread.php?t=4785