Hows its going all.

New here with a few questions, Ive owned my T for about 2 years now and have decided to jump in to some mods, coming in the near future that is. Anyways I have a few concerns. I see a lot of people saying that its alright to have a low oil pressure at idle, but they all seem to say that it goes back up at mid rpm. My concern is cruising city or freeway mine sits just barely above the first line, is this ok? My oil is not low... Second question is I do not know jack crap about engine oil. I use Quaker State High Mileage in my motor every 3k miles. I was wondering what you all thought about this oil. I have the 96 Auto Trans 4x4 Ext Cab with 170k miles. Thanx in advance for any answers.