It's more like * enough reserve to waste some in traffic. On top of that * enough reserve to find gas station. On top of that * enough reserve to drive to neig

It's more like * enough reserve to waste some in traffic. On top of that * enough reserve to find gas station. On top of that * enough reserve to drive to neighbouring city for gas station. On top of that * enough to cruise 30 minutes around that neighbouring city looking for other gas station in case the previous ones were closed. On top of that * enough station to run around parking lot looking for space to park