First of all, they're not gift cards. You can't use a fuel savings card to pay. Instead, you get a fuel discount in the form of cents-per-litre savings, which means that you save an amount of cents for every litre that you pay for. Depending on the card you choose, you will have a maximum of litres you can save on.
How to Use a Fuel Savings Card
Combine Fuel Savings Cards With Gift Cards to Raise Even More
Combine your fuel savings card with a gift card to make the best of it. Get a discount on your litres with the fuel savings card, pay the balance with a gift card, and raise more donations for your group at the same time.
Here's an example. If you purchase a $100 gas gift card offering 2% in donations, your group will receive $2. If you also purchase a $50 fuel savings card that offers 20% in donations your group will receive an extra $10 and you get your $50 back in the form of savings. Basically, you pay $50 and get it back, but your group raises $12 instead of only $2 in this example.
Once you wrap your head around how Fuel Savings Cards work, and how often you should order one, you can raise a lot more money for your group each time you fuel up.