Overnight my oil temp is going up to 200 deg. when idling. Checked oil cooler,seemed fine.Oil pressure is fine , water temp is good its just oil temp. Guage is fine . Any thoughts ?

Sounds great to me?

Are you getting pan temps? basically is your sender before or after the cooler? 200 is perfectly fine if you are before the cooler, if it is after the cooler I would say its just a touch high, but not really concerning. More of a concern is the change, so the question is why did it rise in temp from what it normally is.