Today was the coldest day I have started my truck. Plugged it in all night started fine and oil pressure went to normal and then check gauges light came on and pressure dropped to 0. Shut off the truck checked oil and it was fine, restarted and oil pressure went to normal and stayed there the temp was -12F and with the wind chill it was near -25F. I am thinking maybe the oil was thick and it was taking too long to build pressure. I do not have a manual gauge on it right now. Do you guys think that this is something that I should be worried about going forward? Any replies are appreciated and thanks in advance.