Why is the 5 bad for breaking it in? long stretches, open road... not a lot of stop and go (at least not on a holiday weeknd). There are speed traps, but you won't be going fast breaking it in.. only part is when it stinks near the slaughterhouses
i'd say stop by Santa Barbara, especially if you take the 101 down. BTW: SB has traffic before and and the end of weekends (friday and sunday afternoon/evening).