Just finished my first oil change on the expedition (2004 5.4 l), put in 5 quarts, then added about half a quart more, started the engine let it fill the filter, gave it an hour to drain and checked the oil. The level reads extremely high. Seems like every time I check I get a different reading, but most of them are above the max line. I drained the filter and restarted and rechecked but it didn't seem to change much. Is it possible I have the wrong dipstick? Anyone else have issues getting a consistent oil level reading? Thanks in advance.