Every time I take my 2003 XK8 coupe to a garage for an oil and filter change, after the new oil is in the level is about 3/8 inch above the max line when they put in 7.5 US quarts. I checked it after I let the car cool and sit overnight. I check it in my garage where the floor should be level. The manual specifies 8 quarts. This happened with four different garages. The dealer says the length of the dip stick is correct.

Has anyone else had this problem?