hey what should i be expecting to get out of stock 2000 f150 all it has is a flowmaster muffler. i guess you could consider my driving more city being i am stopping and going alot out on the more rural roads. the sheet says 14mpg but i doesnt even feel liek i am getting that.

 

Lots of factors, but 10-20mpg sounds right. MY 99 Sueprcab 5.4L 4x4 3.73 axle with 32" OEM tires got 14-16. My 20034 Supercrew with same drivetrain, but larger/heavier tires get 11-13.

 

I'm getting around 14-16 like APT with about the same drivetrain. Looking to do better with a tuner, maybe 1-2 mpg.

 

I am getting around 14-16 as well and better on the highway. I have an K&N intake, Edge Evolution, and Flowmaster. If anything the flowmaster might be hurting the MPG a little, might be better with a straight through muffler like Magnaflow.

 

yea, it just seems that my guage goes down fast
ive borrowed friends 97 f250 w/ the 5.8l and it didnt seem to go down as fast, well maybe it did it was awhile ago lol

 

I have an 01 4x4 with a 5.4L 3" body and 315/75/16's 3.55 diff and no matter how good I am I get no better then 12. I am pretty consistant at 11.2 ~ 11.4

 

You need to do the math. Guages are not linear. The fuel tanks are probabyl not the same sinze between your truck and your friend's superduty. He may have a 35 gallon tank and you have a 25. so even if you get the same mpg, your guage goes down faster.

Fill the tank up, drive it, fill it up again. Divide mile driven by fuel gallons put in the second time.

 

well idk how many gallons his are because he has the 2 tank deal

 

i get 17c and 22H. mods in sig, but from full i get almost 250-300 miles before it drops below the F then i only get 150-200 on the rest. i think its the tank dezine

 

holy crap
u got alomost 300 miles before it even drops below the full mark? daaamn
i drive aroudn the corner and im already down
and also having new exhaust doesnt help my driving habits lol

 

My point was, it doesn't matter what he has. You should do the math to figure out what you are actually getting before concluding your truck sucks. Ignore the guage for fuel economy calulations, yours or anyone elses.