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gas mileage

gpgt98

gpgt98

New member
Just wondering what the average mileage is with everyone's cars? My dic is 21.7-22mpg city driving and driving with a light foot.. and how many miles do u guys get out of a full tank? I get around 310 miles, but when I fill up, my range is around 375-380.
 


I average about the same as you with a GT. Not sure how many miles Ive pulled out of a full tank. Dont remember what it was off hand.
 
Right now, I'm sitting at 320 with still a bit over 1/4 tank left. Lately its been getting really good MPG's. I can normally get 23-24 (27+ pure highway) out of it doing mostly rural driving. And I'm pretty light on the pedal. Overall, your numbers are very close to my GT's.
I did run some sea foam thru just the gas tank and it did seem to help a little bit.
 
I will be running sea foam and doing a tune up soon. And I have a bad 02 sensor so a new one is on its way.. the most I've ever got out a full tank was like 325.. I'm usually at 150miles at half tank
 
Sounds about normal. I keep track of all my miles i get out a tank and figure my MPG's against the DIC (which actually seems to be pretty dead on).
When I got my car, it'd had a new to it motor put in about a year prior. I'm sitting at 105k miles now so theoretically it's due for new plugs/flushes and all that good stuff. But, I'm not sure if all that was replaced when they swapped engines.
Can't hurt to do it anyways.
 
Never hurts. When I bought mine they told me they had did a tune up and flushes ect. Checked plugs and wires and trans fluid, all were bad or old. So I ended up doing it all. MPG didnt go up though.
 


I'm going to sticky this so no one makes this exact thread over and over again.

Right now I'm getting 17.4 MPG city only because I'm being nice to it.

I can get that number quite a bit lower if I tried.
 
Yeah it def wouldn't hurt. Im replacing the fuel filter as well and will run seafoam thru gas tank, oil, and vacuum lines. Hoping to smooth out my idle a bit and get back some mpg's.. Also a ubend delete to free up the exhaust more
 
matt5112 said:
I'm going to sticky this so no one makes this exact thread over and over again.

Right now I'm getting 17.4 MPG city only because I'm being nice to it.

I can get that number quite a bit lower if I tried.
Click to expand...

Yay my first sticky!! lol
 
67373.png
 
Like 15-16 mpgs lol.

I drive it maybe 7 miles a day when I do drive it. I can get around 225ish to a tank most of the time, but if I drive it lighty around town I can get 18-19ish mpgs which is pretty good IMO. I'm sure I'll chime in later to say what I'm getting for mpgs later on.
 


The '01 has dropped off a good bit in the last 6 months- Was at 22.7 city, now it's between 17.9-18.5 by the DIC. Beats the isht outta me.
 
Mine went up on this last mod install, I did the SSIC, ported SC, TB and LIM at the same time and now it's 20-22 mpg city driving and 35+ highway with a very light foot. It was doing way worse before I installed those. I still haven't figured out why the MPG improved so much with those parts.
 


Regal was getting 21MPG. The 2 door GTP was getting 24-25 mpg, but could get 27 mpg if I drove lightly. Which now after dismantling the engines and looking at the 2 different engines pistons, figured out the previous owner of the GTP swapped in a NA block to essentially make a topswap. Could be where I get the extra mileage.
 
Getting about 25 mpg's with about 80% highway miles according to the DIC. I still have yet to tune the car with the headers.
 
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