How long was your car sitting before you checked the oil?? Let the car sit a good 10 min, pull the dipstick out, clean it off stick it back in, and pull it out again and read it, if your oil line is -----< that much over the full line your internals are swimming in oil and this is NOT GOOD. If its at the line then your ok but I dont like seeing oil levels right at the full line, so anywhere between halfway and full is good. Did you change the oil when you got the car??? If not get it changed. Who knows what happened to the car before you had it. If there is too much oil in the car this could have damaged the oil sending unit.