I noticed recently a slight oil leak on my Copen. The car had been serviced oil & filter when I had the MOT about a month ago. I was being lazy not doing it myself. I thought perhaps the sump nut or oil filter was a bit loose. Checked the oil this morning to see how much oil was being lost. The level was well over the maximum! So I've promptly drained some out, at least 0.5litres came out. Now it's just below the max level. Not too impressed with my mechanic. I won't be using him again. I'm hoping the engine oil pressure was high due to the over fill. Which caused some oil to seap out. Going by where the oil seems to be coming from I'm wondering if the seal on the dip stick tube has failed. I'll monitor it now the oil level is correct. My advice to you all is that if you've had your oil changed by a garage. Check the oil level yourself after.