After driving my truck for for 30 minutes or so it has a small (gas) leaks from the gas tank area.
My car has 176000 miles.
My car has an automatic transmission.
As you know, a gas leak can be extremely dangerous depending on the specific location of the leak and the proximity to hot parts, such as exhaust.
I would recommend having an expert, such as one from YourMechanic come to your location to diagnose and repair your fuel leak as soon as possible.