Am also on same page with fresh oil change. Get break in oil out and new in. Yeah, I know...I'll get flamed for it sounding too old school, but if you are taking that long of a trip with sustained speeds, most likely, nice to have fresh oil now that break-in time is completed.
At same time, have a tech--- or DIY-- double check torque on wheel bolts. They may be OK but may also have worked the adjustment-need magic after 1800 miles. Air inflation as above is a must. Don't assume its the same as when you picked it up. And even then it might not have been spot on. Have a great trip...
