Okay, so I got my oil changed yesterday and when I got home I noticed they charged me for 7.5 liters of oil, rather than the usual 5.5 liters the 4.9 takes. I checked the dipstick and the oil level is high. The mechanic must have had "Northstar" on his mind. Question: Is this no big deal, or should I be crawling under the car and draining 2 liters out of the pan?