I have that engine and it drinks
oil like a sailor. There were more than a few people who reported the problem to be loose valve guides and or
oil seals.
Ford's answer is for you to pull it, crate it, then send it to them on your dime. Then they can say nothing is wrong, and ask for a shipping label for you to pay to ship it back and reinstall. I decided at $4 a quart, I'll buy a quart every 2 tanks and not worry about it.