Mostly city driving, I get about 20 MPG on average. I don't do much highway driving, but the best I had was 25'ish MPG mixed driving.

My gas mileage got quite a bit better after a bigger turbo... Less time spent in boost...lol

 

any number over 1 surprises me

 

original fp green boosting at 25 psi. City 15 mpg and Highway 20 mpg

 

Best mpg on e85 was 22mpg when I did a trip from SoCal to NorCal, and then on 91oct my best was 28mpg doing 55-60mph on the freeway

 

I have managed 28mpg a couple of times on interstate trips. My usual mileage is about 25 on the highway.