I have a slow leak and would like to monitor it little better, how hard is it to install an oil pressure gauge and what's a good one to get?

 

Surely you never search before you post a question. You can install any gauge easily. I would recommend using a sandwich adapter instead of teeing off the stock sender. Run to the auto parts store and pick up the cheapest one you can find. The adapter you might have to get online.

Don't understand how that addresses the real problem-the oil leak.