A few points seem odd to me. I thought I read somewhere that once you go down a certain depth in the ground the soil temperature is pretty constant. That would seem to indicate it doesn't matter what time of day you fill up. Secondly, I heard about the last point previously but ignored it as it seems pretty unlikely there isn't a filter between the buried gas station tank and the nozzle you're putting into your car's tank. The "only fill up on half tank" doesn't sound right either. You would have to fill up twice as often and thus two times the volume of a 1/2 tank is equal to a whole tank. This all sounds like nonsense to me.

Edit:

Just did a search on filters in gas station tanks. As I suspected, there are multiple places where the gas is filtered. From one post is says it's filtered before filling up the gas tanker truck, filtered when gas tanker truck fills gas station tank, filtered from the tank to the pump. And then it's filtered again from your car's gas tank before it enters the carburetor.

A few points seem odd to me. I thought I read somewhere that once you go down a certain depth in the ground the soil temperature is pretty constant. That would seem to indicate it doesn't matter what time of day you fill up. Secondly, I heard about the last point previously but ignored it as it seems pretty unlikely there isn't a filter between the buried gas station tank and the nozzle you're putting into your car's tank. The "only fill up on half tank" doesn't sound right either. You would have to fill up twice as often and thus two times the volume of a 1/2 tank is equal to a whole tank. This all sounds like nonsense to me.

A couple of points seem odd to me. I thought I read somewhere that once you go down a certain depth in the ground the soil temperature is pretty constant. That would seem to indicate it doesn't matter what time of day you fill up. Secondly, I heard about the last point previously but ignored it as it seems pretty unlikely there isn't a filter between the buried gas station tank and the nozzle you're putting into your car's tank. The "only fill up on half tank" doesn't sound right either. You would have to fill up twice as often and thus two times the volume of a 1/2 tank is equal to a whole tank. This all sounds like nonsense to me.

A couple of points seem odd to me. I thought I read somewhere that once you go down a certain depth in the ground the soil temperature is pretty constant. That would seem to indicate it doesn't matter what time of day you fill up. Secondly, I heard about the last point previously but ignored it as it seems pretty unlikely there isn't a filter between the buried gas station tank and the nozzle you're putting into your car's tank. The "only fill up on half tank" doesn't sound right either. You would have to fill up twice as often and thus two times the volume of a 1/2 take is equal to a whole tank. This all sounds like nonsense to me.

A couple of points seem odd to me. I thought I read somewhere that once you go down a certain depth in the ground the soil temperature is pretty constant. That would seem to indicate it doesn't matter what time of day you fill up. Secondly, I heard about the last point previously but ignored it as it seems pretty unlikely there isn't a filter between the buried gas station tank and the nozzle you're putting into your car's tank.