Blow By

I'm currently driving a high blow by engine in my latest rescue car which has unknown mileage and sat for 8 years before the rescue. At 30-50mph doesn't use hardly any oil. Cruising from Tucson to Los Angeles, about 600 mi at 75-80mph, I used a quart of oil per tank of gas. After seeing the increased oil consumption I had a friend follow me on I-10 to check for tail pipe smoke figuring I must be putting out a cloud at highway speed even though I'd never seen one. Surprised when he said he only noticed a small puff of blue smoke when I'd lift up on the accelerator to slow down but none under acceleration. I've so far driven this motor about 40K mi. in this condition. Runs fine and idles smooth regardless. As others have suggested checking the maintenance items like the PCV is the best place to start. But if you have a high mileage oil burner just keep it full of oil and you'll be fine.