how can i get better gas milage
I have a 91 sentra w11 gtir turbo, 50lbs injectors, calum basic ecu, walbro pump. I drive about 20 miles per day and i get on it not to even get to 15psi, i run 8psi but car dont get over 70mph. I have to fill my car up about 3 times a week. need advice badly if i cant get better milage i have to sell this or dont drive cheaper to put it in storage than drive it need help badly