I just did mine Friday. 09 Muscle. Surprisingly it took 5.5 to fill it to the full line on the dip stick. Remember, you are to check the level with the bike warm and allow 2 minutes to drain back into the sump. Screw the dip stick all the way in.
I started at 4.5 and added .5 at a time till I reached the full line. I did my own 5000 mile service. So it was the first time I changed my oil also.