Just did my yearly oil change my 69 coronet; Went from Rotella T 15/40 to Rotella 5/40 Synthetic...

Oil pressure still on the high side, 80lbs cold idle, 45 hot idle after 20 mins and a couple of high rpm highway runs, temp at 170, outside at 60ish.

Any thoughts on this oil? Was looking for slightly lower oil pressure on fire up, not finding it.

Any additional additives needed for flat tappet 550" lift cam?

Thanks for all input.


2005 300C Hemi
2014 Ram ProMaster 2500

I Rekey, Repin old Chrysler locks and cut keys by code