Fuel Card Question

Hi, not sure if this goes in this specific thread.
I am managing a fleet of 38 vans/small trucks. I am looking to get a fuel card that will help prevent fuel misuse and theft etc. Currently, our drivers swap around trucks and no one has a designated truck/van. What would be the best way to assign fuel cards and what would be the best fuel card company to use for this? How do you prevent fuel misuse in a case where you would have 3 drivers swap on the same truck in 3 days. Would it be best to assign each fuel card for each vehicle? Or possibly to assign each driver with their own fuel card and pin? If each driver has their own fleet card, how do you monitor mileage? If each truck has their own card, how do you monitor who fueled it today and tomorrow and so on? A bit confused on this.. Thank you for any input

 

That does sound like a good option, but I am trying to avoid having them do more sheets and logs if any way possible