Transport of fuel

Hello guys, there are a lot of topics on the internet about reserve canisters. I have to transport a larger amount of fuel soon and wanted to ask now what I can do so that there is no trouble with the race management. The problem obviously is the word reserve. Because a buddy said to me that I can only transport fuels that are intended for my vehicle in the canister. As a diesel driver I would not have any spare fuel if I had petrol in my car. I have to get some 80L of gasoline to my home. Can there be any problems?