All you can do is to reduce the oil consumption by using additives or thicker oil (maybe 10w-40). I would use additive first as the thicker oil is not the recommended weight.
You still need to top up the oil and may need to do additional servicing to do with oil consumption issue. This may include replacing the spark plugs more frequently and also clean the combustion chamber with foaming cleaner (nulon or Subaru). If you do this, car should be OK for a while.