MRX_Rotary

Yeah, I just got my car about a month ago. Anyways, my dipstick gets a reading about halfway between the low and full mark, how much oil should I add to top it up? Also, on a sort of long ride I noticed my oil pressure guage was reading about halfway between the 60 and 100 mark a couple minutes before I reached my final destination. I wouldn't think this is normal... wassup? From what I can tell, the oil still looks relatively clean, and I have 20w-50 oil in there with a fram filter.