Robert11 wrote:
> Hello,
>
> If your car had an oil change at the Dealership where they put in "Synthetic
> Oil," what would
> happen if you add a needed qt. later, e.g. on the road where synthetic might
> not be available ?

Well, synthetic is available pretty much everywhere, but its completely
compatible with conventional oils anyway. Nothing would happen if you
added a quart of conventional oil.