How big is our gas tank?

[The Green GT]

Im trying to see what kind of MPG Im getting.

 

[The Green GT]

11.5 MPG on the interstate.

 

[Stanger007]

J/k...

You coming to the track Sunday?

Wes

 

[1TallMF]

I believe its a hair above 15 gal.

Easiest thing to do is to fill it up to the top, set your trip odo to zero, go drive for a while, like 1/2 a tank, and go fill up again and look at the number of gallons on the pump when its full, and divide the number of miles by the number of gallons.

 

[Stanger007]

Easiest thing to do is to fill it up to the top, set your trip odo to zero, go drive for a while, like 1/2 a tank, and go fill up again and look at the number of gallons on the pump when its full, and divide the number of miles by the number of gallons.

That is excellent advice if Eric knew math.

 

[HISSIN50]

Stephane is right on. It's 15.4 gallons though no one can ever get that much in there (there's a difference in the volume of the tank and how much gas can be pumped in there - for density and overflow reasons).

Since Eric doesnt like math, the tank holds 2.6 bodies.

 

[Therian]

11.5 mpg means there is something very wrong...you'd have to be autocrossing to get that mpg in a well running 5.0...

 

[HISSIN50]

Or idling forever.

I'm reminded of my buddy (67 fastback, 428CJ). He doesnt drive the car much over the winter. His first fill-up of the season generally nets 2 mpg.

 

[The Green GT]

J/k...

You coming to the track Sunday?

Wes

If I can make it there on a full tank. lol

That is excellent advice if Eric knew math.

And if my odometer worked. I rode with my sister to school today, so I was able to get the distance.

 

[The Green GT]

now since we all agree 11.5 MPG is really bad, lets figure out whats causing it.

 

[94-302-vert]

11.5 mpg... is this actual miles divided by gallos used or number of miles divided by 15.4 gallons?

 

[The Green GT]

15.4 So I know its not 100% accurate. Ill fill up before and after going to school next week.

 

[Bosko5.0]

did you change out your speedo gear?????????????????????????????????????????????????

 

[The Green GT]

Yea.

 

[95five-oh]

Are you driving on the highway in overdrive or on backroads where u shift through the gears a lot? That makes a big difference. I used to go all rural routes to school but now i go on a larger state road where i can run 55-60 and keep it in 5th....easily another 40 or so miles to the tank.

 

[The Green GT]

Pretty much all interstate.

 

[95Mustang302]

how many miles on the car, are the o2 sensors stock?

 

[The Green GT]

Id gues about 130-140 K on the car. Odometer is broken. Changed the O2 sensors very recently. But MPG was **** before too.

 

[trav_19]

11.5mpg and a 15 gal tank your averaging 172 miles a tank full....are you sure your numbers are right!!!!!! thats insanity my built 351w was getting 10 highway ....somethings horribly wrong here...

 

[HISSIN50]

I have the feeling that once you get miles per number of gallons figured out, it will be better. It's rare to get more than 14 gallons into a tank.