you sure it isn't 6 gts. that normal capacity for the 4.2. you might have the wrong dip stick or tube. many years ago I bought a used ford truck and had the same thing happen, turned out to be the wrong dipstick. don't do what I did, I filled it up and the motor started leaking everywhere. check your oil pressure with a mechanical guage, you might have a bad one.
Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.
the voices aren't real but they sure have good ideas.