I have a 96 sentra with 130K miles in it. I have been using Pennzoil
High mileage 10-40 in it for sometime. I was wondering if it will do
any good if i switched to a semi synthetic or full synthetic. Will this
have any effect on damaging the seals?

Hello, a couple of questions:
1)  I have a 1998 Nissan Sentra GXE with 14" wheels.  The original hubcaps
were recently stolen, so I want to replace them with the bolt-on type.  
I've searched dozens of websites and can't find bolt-on hubcaps for these