Will a Turbo decrease my gas mileage?

look just rule of thumb.. if you make the same power at lower rpms boosted.. your saving gas compared to making the same power at higher rpms naturally aspirated.. their are hundreds of turbo kits for the 2.2l motor used in s-10s.. i fully recommend it.. i had a friend do it in highschool and while it only put out 220hp (compared to 95hp) at the rear wheels it made a world of difference when we were hauling our four wheelers around in the bed of the truck and on a trailor