Welcome to the forum, milkshake! Uhh, that mileage is BEYOND bad--you've got something wrong with that engine, friend. Yes, the 3.0 is notorious for doing poorly, but not single-digits. If that is simple tune-up parts, then they must be so bad as to be nearly disabled. You should be seeing closer to 12-15 in town, and high teens to maybe squeeking into the twenties on straight highway driving. Best of luck!