Bad Gas Mileage?

[Mustangless]

we have a 15.7 tank. Mine has always been bad city, from 10-14 but hwy has been around 24-26.

 

[Hef5.0weisen]

A couple of days ago I drove from North Carolina out here to LIttle Rock (again). On I-40 thru Tennesse I got 289 to a tank, with enough left on the gauge to hit the majestic 300 mark, That was total cruise control driving on flat highway. I'm normally around 200-230 back and forth to work at home.
I still think some gauge is lying to me though.

 

[Synned]

Sadly, most of us will never figure it out.

 

[igotyofire]

so far i disagree, old 02s will decrease mileage IMO and my mechanics opinon altho i will double check with him. because on obd2 cars the 2nd 02 sensor is only their to check cat efficiency

 

[Mustangless]

check for vacume leaks, and for codes. I did find out my egr was leaking

 

[mo_dingo]

Quit your complaining guys. I get around 9-10mpg and usually 130miles before I fill up. But I don't wait until I have .4 gallons left in the tank to fill it. Usually around 1/8 of a tank left.
Scott

 

[Green 94 5.0]

wow.....let me be the first to tell you that you guys are all lucky. the truck gets 10.5mpg and has to have 93. i get about 260 miles to the tank on 25 gallons. as far as bad mileage goes, you may want to do a full tune up if you havent already:

spark plugs
plug wires
fuel filter
o2 sensors
clean the maf
clean or replace the air filter (depending on what you have in there already)

that would be a good starting point to increasing gas mileage.

 

[Bens95cobra8594]

I think that winter blend fuel may potentially be an issue, but I am not sure that FL uses winter blend gas (I don't live there) and doubt that gas companies have fully switched over in September/October.

Captain Obvious says: "City driving is horrible for fuel mileage. When you are idling you are getting Z-E-R-O mpg and when you accel off the line the engine is working, working, working, working and then stopping and back to ZERO when you stop again."

A tune up may help, but it may just be throwing a few hundred bucks at a problem that is just the characteristic of the car.



But good luck...

 

[ProKiller]

i'm picking up what your putting down there ben but a tune-up can't hurt. it may not help the gas mileage situation but it will help the engine in general.

i think i get about 150 miles to tank