i lucky to get 200 miles a tank. and most of its highway driving. i did everything that i could like plugs wires fule filter, seafoam and other stuff. i use 93 oct and it just sucks the gas down. i have no check engine lights on. its a v6 12v and manual. does anybody else get this kind of mileage, or any advice at all.

 

i usually get around 270 from the tank in my 2.8 v30, but thats city driving. when i go for longer trips i get around 340+. did you check your tire pressure and cleaned the air filter? i would also guess that your o2 sensors might be going bad. btw could you post some pictures of your car? i would like to see that flat black paint job.

 

First, have you tried a different gas station?

Second, how long has this been happening? Is it recent or always? Winter blend gas tends to get a bit worse, or so I hear.

Third, clean your MAF, throttle body, etc.

Fourth, have you scanned for codes? Sometimes you might find something out even if you have no CEL...

Fifth - ever change your front O2 sensors? They wear out over time and if yours is old, I can guarantee that it's not working as well as a new one would, even if you're not getting codes.

 

Ive been experienceing the same thig lately. i am only getting about 55miles per quater tank I just put new double platnium plugs in too Might be wrong but i did it anyways.
im going to clean the throttle body next and then the o2 sensors
Im running 19" rims now and a flat K&N air filter. I cut the bottom off the base of the stock filter housing. Turbo exhaust with 2.5" exhaust from the cat back the to 2.5 single to the muffler sounds good.

 

the age of the car its mostly the 02 sensor going bad