I've owned my 2007 Coupe for nearly 11 years. And I have never checked the oil level using the dash electronics. I do know it works because I got the HI level reading several years back when I performed an oil change and tried to put 8 liters in the engine. While up in Fontana NC for a Crossfire weekend, the HI warning came on multiple times whenever I drove aggressively thru those "twisties". Came home & siphoned out about 1/2 quart and never got the HI warning again. They gave me an engine oil dipstick, so I use it! Eight quarts gives a reading of nearly FULL on the dipstick, so I figure things are okay.