sub4ru

I had an incorrect setting in my ECU. It was causing my idle to run rich and hurt my idle with AC load.

Personally, I think chasing MPG is a waste if time. Just drive the car. If a person can't afford gas, find a different means of transportation. Also, buying a new or newer car for the mileage benefits is out weighed by the extra cost of the vehicle.

Neither. Swapped from twin to single turbo. Also, my AFRs were off for a few months and I just figured out why. So maybe my MPG will go back up.

I have not seen 26mpg since this post. I regularly get 18.5 mpg now. Its sucks buying premium. It costs me $80 to fill up in Japan.

26 mpg!

It turns out my o2 sensor was inop. New sensor is installed and ill update you all later.

Your link to DCCD is bad. Use this one http://www.autos.ca/auto-tech/auto-tech-subaru-brings-rally-car-technology-to-the-street/

Yes, I have a VF28, and DCCD from an STI, and some other goodies. http://img.tapatalk.com/d/12/10/04/y6ahuqa4.jpg You can see the controller, and my ridiculous e-brake handle, in this picture.

I get 15 mpg with premium, though have a single turbo and a tune.