As long as its not really cold a 10 minute highway drive should be just enough to heat up the engine oil and burn condensation off.
I would stick with a conventional as synthetic won't give you anything but longer intervals, last thing you want especially if you arent heating up the oil a lot. Just open the cap in the morning and see if there's condensation/yellow gunk on/around it.
I would stick with a conventional as synthetic won't give you anything but longer intervals, last thing you want especially if you arent heating up the oil a lot. Just open the cap in the morning and see if there's condensation/yellow gunk on/around it.