2001 Honda CRV Another qestion from the broken timing belt

Took to a Honda Only shop. Told me they were going to redo the head. This took 4 days. Once back, 5 days later wife tells me check oil light icomes on and off.
I checked the oil, added 4 quarts, called the shop back. Told me to do an oil consumption test! I called them back the next day and told them an oil consumption test was already done. My wife drove it 500 miles and used 4 quarts of oil. In addition white smoke was coming out of the tail pipe.
They took it in, and sent the head back to the shop. The shop tell them its the rings not the head. They get the head back, replace it, check everything out and tell me it is ready for pickup.
They say they replaced the PCV valve, and the oil consumption dissappeared.
However, there is still white bluish smoke still coming out the tail pipe. They say it will pass emissions inspection. They say it is the rings, and the car will run fine for a long time. BUT the car did not have the smoke before the timing belt snapped.
BUT I am not schooled in cars, I only know what I read or hear about.
Compression tests are fine, BUT the car is going thru 3 quarts of oil every 350 miles, eventually it may go unless the oil problem can be located.
The work that was done is fine,
How can it be checked to determine what is causing the oil to be used so fast? Is it simple? Is it expensive?
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