1995 Accord Runs great but burning oil

So this car of ours has 137,000 miles. It runs great. There are no leaks of any kind. I’ve followed the car in another vehicle while my son drives the accord in front of me. There is absolutely no oil burning smell or smoke that I can see of any kind.

The car is driven about 80 miles per day at 50-70 mph. Freeway and city, but mostly freeway. The car burns about 1/2 quart of oil every 400 miles. Could this be something that is not a major repair?