A quart in 5000 miles is not a concern. All engines consume some oil.
Those that appear not to consume oil are just replacing the oil
consumed with blow-by condensate. Sudden changes in apparent oil
consumption are often the result of taking a long trip. During normal
day to day operation it is likely that the oil never gets hot enough to
vaporize all the blow-by condensate added to the oil. When you take a
long trip, the extended period of engine opeartion allows all the
condensate to be vaporized and sucked into the intake system via the
PCV system. This makes it seem as if the engine suddenly increased its
oil consumption, when in fact nothing much has changed.
If you are still worried, a general chack of your engine for leaks is
in order. You should also make sure your PCV system is operating