now it sounds like a diesel?

I did my oil change yesterday using the over sized k&n oil filter, and valvoline vr1 20-50, i used this oil because it is the thinnest vr1 that i found, and a friend of mine told me that it contains higher zddp which is good for our motors.But my jeep now sounds like a freakin diesel, is this oil far to thick, and will it hurt my motor? Because if it will i will change it right away

Also it seems to be louder in the morning, after driving around for a bit it is still audible, but not as much.:smoker:

To me that sounds like it might be to thick when oil gets warmed up it thins out some. I'm not sure what would be called to thick, but if it was me and that was happening I would try changing it to something thiner.
CJ