On the dipstick there are two holes. The manual for the car says that as long as the level falls between the two holes that it is fine and not to add oil. Every time the dealer has changed the oil it was right up to the top hole. Last night I changed the oil myself and added the required six quarts per the car's manual. However the oil level is not quite up to the top hole. More like 3/4. I realize the manual says this is fine but why the discrepancy between the six quarts when I did it myself versus when the dealer did this? Are they putting more in?