I received my second vox box called the VivaVoxBox. I needed gas in my car. The Shell Fuel Rewards card came at a perfect time. I activated it online. Then went to fuel up. Gas is $3.79 per gallon. Memorial day weekend is around the corner. I know it will go higher. At the pump there are instructions to tell you to swipe the reward card first before any thing else.
Once you sign up you can also sign up for other programs via the FRN (Fuel Reward Network). Savings on Allstate insurance, shopping, dining and groceries. It might be worth looking into, just to save a few pennies. Remember to always read the fine print before signing on the dotted line.