runs out of gas? i have a 2004 chevy malibu ls v6..when i bought the car ti was used with 97l on it one of the probs with the car is that the gas gauge does not work ..i use the odometer gauge as my gas gauge ..he said he usually filled it up around the 280 mile marker.i want to know if anyone knew how far my type of car could go before it runs out of gas?