Yes! We are working hard to keep our database up-to-date in terms of petrol station. If something is missing - you can add new petrol station by yourself. You can do that while adding new fillup. You need to select petrol station and if it's not there you can use add button. You can add petrol station only when you are at the place.
Another way is to send us mail with location of the station and name.
See the screenshot - Adding new price (Home -> Add Fillup -> Click on Select station)