As another aging owner of another aging aircraft, I really don't know enough to know what questions to ask. frown

I do know I am beginning to think our C-150 has the wrong spinner because it covers most of the oil cooling holes. During the winter and in cooler weather, our temperature and oil pressure are okay (oil pressure maybe a couple of needle widths above the bottom of the green arc, temp a little below half way in the green). When the weather gets warmer (80F or so and on up), the temp goes up over half way and the oil pressure barely into the green. Chuck Hannah had quite a dissertation here a while back. My question is would the covering of the oil holes be enough to cause this problem??