Diesel selection

Good day all. Getting to know my brand new Sierra Denali and following the manual like my second Bible and they do suggest putting top tire diesel in it but the closest station is about 60 miles from me. And in my opinion it’s kind of stupid to drive that far just to buy diesel. How do you go about choosing the station near you with the best quality diesel? Is there an app or a website anyone would recommend? And what about additives? anybody adding any lubricants or conditioners into the diesel? Thanks in advance for your responses