aha, you're still not worse than my car
and if I want to, I can easily get 10-12 mpg if I drive stupid hard. Im trying right now to get this week above 20mpg, so heres to hoping.
by the way, those 5.0s were known for completely clogging to egr screen, which leads to some performance problems but really hurt gas mileage as well. Ask a good tech in your area, they should know what Im talking about. Its like a $10 part.