Low oil pressure at idle when oil is warm

[B5a4atw]

My oil pressure number are good when cold and when hot its 50psi at 2k rpm and 70 psi at 3k rpm
at idle the oil pressure drops as low as 12psi and will go up to 17-18 psi
I'm using 5w40 Pennzoil euro platinum
I used to run Rotella t6 and never had the problem has anyone else had a similar issue

[Nisse]

Since no one has answered I will you give my 2 cents.
I had my pick-up screen changed, I'm no mechanic, but from what I've understood - the oil is more 'fluid' when hot so pressure drop - that means your potentially have an issue with too low pressure overall?
Can't comment on these numbers though.
Have the car has Long Life Serivce? The pick-up screen can get clogged and reduce oil pressure - it's cheap part, but you will need to drop oil pan obviously.
I did it because I read about these issues, and also I had P0012 - camshaft position timing over - I think my tensioner for the drive belt has lost its tension.