I have a 77 240D and was wondering the right oil pressure reading. Even at idle the gauge shows max pressure. I have another vehicle that shows different readings at different rpms. Now I saw a video on youtube that shows the same thing as my car does. Gauge is pegged even at idle. I'm running Shell Rotella 15W40 but will soon change to Amsoil synthetic. I've also read that there are a few O rings that are on the bar that goes through the oil filter that can affect the pressure. Any help would be appreciated.