My preference is to do oil changes every 4k, but I’ve never had a car with an oil monitor. I’ll bow to the majority on this one.
One suggestion, get into the habit of checking the oil level on a regular basis. Most Owner’s manuals say to check the oil at every fillup. I check mine every 2 weeks or so.
Most cars will not use much oil between changes, but there are exceptions. More than a few posters have had newer cars with damaged engines due to low oil. A common thread in these occurrences is a failure to check the oil level between changes. It only takes a minute to do this and is also a good time to check for anything amiss under the hood. For example, during oil level checks on my 2000 Blazer, drops in the coolant level were found to be due to a leaking intake manifold gasket and a leaking radiator. Both times, the problems were fixed before any major damage occurred.
I would also bring an extra quart of oil for the road trip just to be safe.
Good luck,
Ed B.