00 Vibration/No Gas

[Falcon]

I just got a 00 this week and I noticed a vibration at 60 to 70, Its not in the stering wheel as much as its in the seat. plan to have the tires balanced today on the truck. but was wondering if it could be anything else?
Help? Also used the first tank of gas and I only got 14 MPG and I've not been getting on it hard at all and 80% of the miles were highway miles..

Thanks
00 HD

[Suds5.4]

Is it lowered and does it have any performance mods?

[shanker]

I have an AirForce 1 on my truck and if I go strictly highway, I get 20mpg, but i also get better mileage at 70 than at 65


about the vibration, getting a balance will help you out...ALOT!

[Ayrton]

Fuel filter...

[INTHE12'S]

New O2 sensors might help the MPG.

[Falcon]

The Truck is not lowered and the only mod is a K&N FPK intake. I'm taken the truck in the morning to get an on the truck balance done. It has 32000 miles I'm not sure if the filter has been changed? Should I change it anway? If the o2 sensor was acting up wouldn't there be other signs like rough idle?

Thanks guys

[musturbo]

NO offense Shanker but my 00 mustang doesn't get 20 mpg hiway. I'm sure your's does, but i would imagine it is not the norm. My 02 dsg Harley averages 12.9 with very little mods.r

[Ayrton]

Depending on how particular you are some guys change the fuel filter every oil change.

[Falcon]

I don't what it was maybe bad gas but the next tank I got around 17 to 18. Which made me very happy. Took a road trip this weekend and it got close to 20 on the highway. But it runs better and gets better gas mileage on low grade gas. I also had the tires balanced and that took 90% of the vibration out. Those Goodyear aren't a good tire are they!
Thanks for all the help.