Been running Rotella 15w40 but have not seen anything lower than 17°F in the past several years. Don't remember anything over 50 psi on the cold days. Summer time hot idle is 22 psi.
In the DFW area I ran a high volume pump and Pennzoil 60. Cooler than here, cold morning idle was never over 90-110psi at it's highest. Didn't damage that engine from too high oil pressure.
|This message has been edited by chris401 on Dec 4, 2017 3:46 PM|