Changed out the pennzoil srt 0w40 to Mobil delvac 1 esp 5w40 CK-4/SN. No lights, no codes, runs well. I like the higher TBN, anti wear additives, flash point, etc of the HDEO. Seems to idle when oil fully hot around 32 psi and hit 56-57psi at 3/4 throttle, which is maybe 1-2 psi higher. It is...