Go to Lists menu > Other Names List. Here is where you put, for instance: Misc Fuel, Misc Supplies. Not every Fuel supplier in the US needs to be named, and they are not Vendor Names unless you get a Bill from them to pay later, and that is AP.
The Credit Card Charge entry is the best place to use Misc names.
You can still use a Vendor Name, when you like the tracking and reporting from the Vendor Center. For instance, you can use a Vendor Name for Misc Fuel Card 1, Misc Fuel Card 2. Even though you can run reports on the Card Used, this would give you a fast perspective to run Spending reports by Vendor Name = which Card.