2008 Honda Odyssey started consuming more oil

Our '08 Honda Odyssey is burning oil after years of not a drop. One mechanic says it’s a known issue when 2 of the 6 cylinders shut down on the highway and the lack of combustion causes the rings to leak. Another said those engines need a “lower end” tuneup, expensive to get down there. Any ideas?

If it’s less than a quart in 2000 miles just drive on.
Some brand new cars use that much and more.

How much is it burning? It would help to know that.