Re: Synthetic vs Organic

[jgraham1@erols.com]

Mark&Michelle Sousa wrote:

> Recently I've made two oil changes Using Mobil 10/40 synthetic

I hope you mean 10W/30. There is no Mobil 10W/40 synthetic.

> motor oil, scince then I've noticed an engine clattering sound when I
> first start the car upand let it idle, it eventually goes away when
> the
> engine
> warms up, but you can still faintly hear the clatter when idling, the
> problem
> is I'm not sure if this was occuring when I was using regular oil,
> should
> I go back to regular or stay synthetic? Is this clatter normal for the
>
> 5cyl?
> or do I have a serious engine problem?
>
> Mark

  John.
1990 QC