Take time and plan. If you think about having a deliberate plan of actions, a person can accomplish all tasks of refueling their car with only using one disposable glove.
You are the only one touching the fuel cap, but if needed clean that before hitting the pump. With one hand you can use a charge card, activate the required buttons, handle the nozzle etc.
Dispose of the glove prior to reentering the vehicle. Do not forget, you must correctly remove the glove.
Last step, use some type of wipe / cleaner and while washing hands, clean the charge card.
This is one way to conserve disposable gloves.
FWIW, not sure way, but before the situation went nuts, I started using my one glove method a few weeks ago. Got funny looks then, now I watch others believing they protect themselves, then fail to remove the gloves as the reenter the vehicle.
On a side note, visited a Drs office a couple weeks ago. Myself, I did the entire sign in with my own pen, and when finished signing in sanitized my hands. As I sat there waiting, I watched a woman arrive and sign in. Immediately after signing in, she sanitized her hands. For her copay, she used the same community pen, then failed to sanitize her hands after using the pen. Sad part, immediately after signing the pen to sign the credit card slip, she began touching her face and nose with hands / fingers that just handled the community pen.
Risks abound everywhere, accept certain risks, but be smart in your actions. Stupidity prevails and is easy, being smart without panic takes more effort but can get better results.