is that normal?

 

Based on how rich the car is from the factory and how heavy your foot is/load you put on the engine (hills really kill fuel economy), yes that is reasonable.

 

I get more than that but just barely. I think it will get better as the engine loosens up as I am only at 500miles. These also have very small tanks (14gallons) compared to others (my eclipse has 16 and our Legacy has 17.5)

 

do the re-tunes increase power and increase gas milage?

 

Depends how hard you drive it, I guess. I've gotten just over 300 miles out of a tank (all highway), averaging around 25mpg.

If you're flooring it all the time, I wouldn't be surprised to see half that, which is about what you're getting.

 

I average about 400km's per tank. Mostly highway driving though.

 

Wow!!! I get about 170 to 200 miles a tank if I am lucky...

 

From what I have heard they increase a good 3-5mpg total after a tune.

 

Man...sounds like my next move...well with the coilovers. Have to close that fender gap.

 

130mile per tank If im on it all the time... and 160 mile per tank when im going as slow as the car will...

 

how big is the gas tank? I don't get 300 miles on my EVOIX either on a full tank of gas.

 

i get 230 on a full tank.

 

Mixed driving I am getting 220 miles/tank (only had 2 tanks so far though)..at ~100km/60miles that makes over the 300km/tank that the OP asked about. Most cars get better mpg after the first couple of oil changes.

 

I get/average around 220-260. The most I have ever gotten was 301 and I filled up 13.2 gallons.

 

Same.