So i noticed that there are no fuel caps on any car. My suggestion is that with the story mode there could be fuel caps and openable doors. It would be fun and realistic to go to the gas station, come out of the car, open the fuel door, pick up the fuel nozzle and fuel up your car. Also there should be currency in the story mode which you can earn from different jobs like delivering something or doing races and spend it on buying fuel, new/used vehicles and buying different upgrades, parts and attachments for the car.