1 Full tank of fuel can't even run 300km?
 

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. :cool:

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. {thumbup}