Xs2, an already thin oil then it gets hot. i use good old 10/40 pure synthetic in every V8 i have. i live in colorado and i drive my duster every day, including sitting in traffic for what seems like days. as long as you have over 10 lbs of pressure for every 1000 rpms, you are doing fine. i know you are expecting more for a new engine, there have been a few threads lately about folks with "low" oil pressure coming out these crate engines...