To be clear, I'm not arguing against having dipsticks, but that doesn't even make sense. Oil pressure has no correlation to oil level until the oil level drops significantly. How do you measure oil level using oil pressure? The sensor in my Audi doesn't go off oil pressure. The car needs to be on a level surface and the engine has to be off for a certain amount of time before the oil level will show on the display. And it's quite accurate under those conditions. If the sensor says I'm 1/2 quart low and I add 1/2 quart, it's full when I check it again. I added an aftermarket dipstick for my own peace of mind though, because as already mentioned, sensors fail.