I get very low millage 8 or 10 per gal. on 2004 Ford F-250 Super Duty

spent a lot of money having it worked on injectors/ head/ starter/filters all chip/just a few other things

1 answer 2 comments
I got 6.8 v-10 , 7 mpg , i guess thats the way they are .
did you get kissed ??
Yeah i guess, what ever that meAns??