Synthetic oil

[SMatson802@aol.com]

When I first start up and when the engine is warm but not worked hard, oil 
pressure is 40 idle, 60 at 2500. When I come off the highway after 15 minutes 
of 3500 rpm in 4th, the pressure drops to about 15 or 20 at idle and goes up 
to about 40 or 50 when at 2500 rpm and above.  I wondered if the synthetic 
would give me a more consistent viscosity.  Also, are there any problems 
switching from a modern premium regular oil?
Your thoughts,
Steve