Don’t use the full speed setting on the nozzle. Use the low setting to reduce evaporation.
Don’t fill up while the a truck is there to refill the station’s tanks. The gas being pumped into the tank will swirl up sediment which could be pumped into your vehicle.
Go early in the morning while the ground is still cool. Liquid expands and contracts… fill up when the gas chilled out w/ denser molecules.
Fill up when your car/Jeep is half empty. Will help reduce evaporation.