I am new to Fords and have a question about oil level as measured by the dipstick. When this car measures low and I add oil it seems as though it takes a lot of oil to bring it to the top line. In other words,on most dipsticks the distance between the lines usually represents one quart, so its easy to know how much you are low and how much to add. I thought this "one quart between full and add lines" was a universal design, but on this car, it seems to represent more than a quart. The dipstick is a Ford, how can I tell if someone put in the wrong dipstick? What's going on here?