When is the best time to go to the gas station, according to my fuel gauged?

That depends entirely on your location and where you are going and how often you drive the car, however it's best not to let the tank get much below 25% as that can shorten the life of the fuel pump. The pump uses the fuel going through it to help cool it and low fuel can lower the cooling. The time limit is also a factor with modern alcohol added fuel as they will start to separate out into alcohol and water with the gas on top after about 90 days or faster in hot weather. Then you try to start the engine and instead of gasoline it draws in a big gulp of ethanol. Now you have an engine that won't run and you have to flush the fuel system and deal with that mess.

This is a bit of a dated idea and does not really apply to more modern vehicles. The idea was that with a metal fuel tank the sediment and rust sits on the bottom of the tank so you don't want to run the tank too close to empty so that it sucks that into the pump. Your vehicle and all modern vehicles have a plastic fuel tank so that does not happen to it.

However, it is a good idea to keep about 1/8 -1/4 tank because the fuel pump is cooled by the fuel so running it low or out of fuel can shorten the life.

Let me know if you have questions on this. Thanks

Opinions vary. Some say you should never let the fuel level get below 1/4 tank because any mud or other debris settles there and will get sucked up. That argument doesn't hold weight because all fuel pick-up tubes and screens sit against the bottom of the tank so they'll pick up the last ounce of fuel. Anything sitting at the bottom would be the first stuff to get sucked up, regardless of how much fuel is above it.

Some say to never let the tank get close to empty, or if you do run it that low, to fill it up right away before letting the car sit overnight. Their argument is as the fuel is used up, air comes in to replace it, along with the undesirable humidity in that air. I have to point out that if you use up ten gallons of fuel, the humidity that comes in is going to settle in the remaining fuel since the vapor on top is going to be gas, which is lighter than water. For every ten gallons of gas you use up, ten gallons of humidity is going to be drawn in and quickly mixed and burned with the gas. Filling the tank with gas won't expel the moisture that's already in the tank.

Be aware too that most gas today has ethanol in it, which is alcohol. That ethanol loves to soak up moisture, but mold also feeds on it. Years ago, lots of people added a bottle of Heet to gas in the winter to prevent the water in the gas from freezing and blocking lines and passages. Today ethanol does that.

I have three vehicles that get driven very seldom. If the tanks are low on gas, I park the vehicles that way to reduce how much mold can grow in the gas. That mold can plug the pick-up screens causing all kinds of stalling problems. When I do plan on driving one of them, I head to the gas station first to put in new, fresh gas.

For my daily driver, I run the tank near empty, but I'll fill it sooner if I find a station with a low price. The stations to avoid are those that have a tank truck sitting there filling the under-ground tanks. That process stirs up any water or debris that had settled on the bottom. Those pick-up pipes do not reach the bottom of the tank specifically so there is a place for that stuff to settle out. Better to wait a few hours before going to the station that just got a new batch of gas dumped in.