Just an observation this evening. Have a 2017 Suburban, 3500 miles (purchased Jan, 2018). Temp outside this evening after work was -18*. Running original Synthetic 0w20 I believe, has not been changed yet (changing oil soon). Hit the start button and up and running. Oil pressure rolled up to 40, then a few seconds later rolled up to 60. It stayed at 60 for 10-15 seconds then ticked down to 50, stopped there for a second then down to 40. When its “warm” it’s normally at 40 (+/- 3), so anywhere from 37-43ish.
Was just curious if this was normal? First time starting in that cold of weather, have never seen it do that before. I’m sure others have been in much worse so looking for other experiences.
I have a diesel truck that simply starts at a higher pressure when it’s cold then slowly moves down. Have never seen a gasser move like this, and fairly quick between the movements. It wasn’t a slow increase or decrease. High temp for tomorrow is -16 so will be closer to -20+ when started tomorrow night. Will watch it again.