You might get better response if you move your thread to the TECH Forum.
The first question everyone will ask, Did it just start doing this?
280 is getting on the high side for oil temp. I don't let mine get over 250 after a hard run. Usually stays at 210 at cruise.
Oil pressure starts at 70 and drops to 50 at idle and never lower than 40 at ile after a hard run. I still think my pressure is high, but it has stayed togethere for three years now.