Mine does not use a quart in 5000 miles. Though I've had some cars and trucks using a quart every 500 miles, like the good old days, usually they were dripping it onto the road or parking place.
But a quart every 3000 miles, whether burned by crankcase ventilation, or dripping onto the road, is pretty good for any modern engine, the Triton V-10 included. I don't add oil in small increments, rather add only when the dipstick checked cold inthe morning (I check every morning) shows it a quart or more down. Thus I seldom add oil, cosidering the dealer often overfills by 1/2 quart at oil change.
Be aware that a level check at a gas stop might read more than a half quart below the "cold inthe morning" level. That much oil is retained in passages and valve covers when a running engine is stopped, and will take an hour or more to drain back to the crankcase. So iftopping off in small increments, you might be working to keep it overfilled.
Tom Test
Itasca Spirit 29B
