I have searched but found way too much info.....I just picked up a 93 LC with 140 K miles, Kazuma supercharger...I live in Texas and right now it's 100 degrees every day. What weight and brand oil have you guys to be the best? Is there a best filter or one to stay away from? And last question...the truck idles in gear at about 600 rpm and at 600 rpm the stock oil pressure guage is at the second to the last hash mark. at 700 rpm it jumps up good. Is this oil pres ok for just idling?