How many miles until out of gas when gas light first lights up on 2005 3.8 liter Mitsubishi endeavor?

That could be hard to find the answer to. What I would do, is wait until your gas light comes on, fill a gas canister with a gallon of fuel, keep sealed in your trunk. Stay near gas stations, bus drive around until you run out of gas, than put the one gallon of gas in your tank, and drive to a gas station A.S.A.P. Then you will always know.